US20110084808A1 - Tracking systems, methods of locating and identifying rfids, and methods of tracking items - Google Patents

Tracking systems, methods of locating and identifying rfids, and methods of tracking items Download PDF

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US20110084808A1
US20110084808A1 US12/972,978 US97297810A US2011084808A1 US 20110084808 A1 US20110084808 A1 US 20110084808A1 US 97297810 A US97297810 A US 97297810A US 2011084808 A1 US2011084808 A1 US 2011084808A1
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rfids
observable
change
interrogator
property
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US12/972,978
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John R. Tuttle
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Round Rock Research LLC
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Round Rock Research LLC
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K17/00Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07701Constructional details, e.g. mounting of circuits in the carrier the record carrier comprising an interface suitable for human interaction
    • G06K19/07703Constructional details, e.g. mounting of circuits in the carrier the record carrier comprising an interface suitable for human interaction the interface being visual

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  • the present invention in various embodiments, relates to tracking systems, passive radio frequency identification devices (RFIDs), methods of locating and identifying RFIDs, and methods of tracking items
  • RFIDs passive radio frequency identification devices
  • RFIDs have numerous uses, including, for example, inventory tracking.
  • RFIDs are utilized in systems with interrogators.
  • the interrogators communicate with the RFIDs through radio-frequency (RF) signals.
  • RF radio-frequency
  • the RFIDs can be either active devices or passive devices. Active devices have their own power sources, and passive devices rely solely on power from RF signals sent by the interrogators.
  • Active devices have an advantage in that they can be utilized further from an interrogator than passive devices, but have the disadvantage that the power source within the active devices has a limited lifespan. Also, active devices can be more expensive than passive devices. Accordingly, passive devices and active devices each have advantages and disadvantages that can render one type of device more suitable for a particular application than the other.
  • FIG. 1 is a diagrammatic view of an RFID embodiment.
  • FIG. 2 is a block diagram of circuitry of a passive RFID embodiment.
  • FIG. 3 is a block diagram of circuitry of another passive RFID embodiment.
  • FIG. 4 is a block diagram of circuitry of an active RFID embodiment.
  • FIG. 5 is a diagram of a wireless communication system embodiment.
  • FIG. 6 is a diagram of another wireless communication system embodiment.
  • FIG. 7 is a diagram of several tagged items at a preliminary processing stage of a tracking system embodiment.
  • FIG. 8 is a view of the tagged items of FIG. 7 shown at a tracking stage subsequent to that of FIG. 7 .
  • FIG. 9 illustrates a visual identification device embodiment in two different configurations.
  • FIG. 10 illustrates another visual identification device embodiment in two different configurations.
  • the observable identifiers can be utilized for determining which RFIDs within a group of RFIDs are interrogated by a particular interrogator.
  • the observable indicators can be visible indicators which provide information about items tracked with RFIDs. Such information can be displayed as a bar code. Alternatively, or additionally, the information can be displayed alphanumerically.
  • An example application utilizing an alphanumeric display is the visual display of shipping information (for instance, origin, destination or time of travel information).
  • a single ON/OFF visual indicator area on an RFID tag may serve as an indicator that an interrogator is presently communicating with that tag by its ID number.
  • multiple ON/OFF visual indicator areas on an RFID tag may serve as an indicator that an interrogator is presently communicating with that tag by its ID number.
  • FIG. 1 An example of a radio frequency identification device (RFID) having a visual indicator associated therewith is shown in FIG. 1 as device 10 .
  • the device 10 comprises a surface 11 .
  • a visual identification (VID) region 12 is shown formed along a portion of such surface. Although the shown VID region comprises only a portion of surface 11 , it is to be understood that the visual identification region may comprise the entirety of surface 11 .
  • the VID region 12 comprises one or more compositions that can be modified in some selected characteristic so that a change in the VID region is perceptible to a person looking at RFID 10 . Such change may be a change in color, and/or a change in an observed pattern.
  • Suitable compositions for utilization in VID region 12 are compositions which create visible changes upon being subjected to electrical power. It can be preferred that the visible changes be induced with very little power input. For instance, if RFID 10 is a passive device, there will be little power available to cause a change. Alternatively, if device 10 is an active device, there will be more power, but it may still be preferred that as little power as possible be utilized to change observable properties within region 12 so that charge can be conserved within the power reservoir of the active device.
  • very low power electronic displays (which can be referred to zero-power electronic displays if the displays convey information in the absence of power) are utilized within the VID regions.
  • Very low power displays can be particularly useful for passive RFIDs, since passive RFIDs have little power available with which to perform enunciation (with enunciation being indication by the RFID that it has received a signal from an interrogator).
  • Passive RFIDs get all of their power from an interrogator's electromagnetic field, and thus are generally not powered (except for a little charge remaining on a power supply capacitor) when an interrogator field is absent. Thus, if a VID region is going to maintain a perceptible changed state, such as a visible pattern, in the absence of an interrogator's electromagnetic field, such should occur with zero power.
  • zero-power display technologies are electronic ink, electronic paper, ferroelectrics, and polymer electrochromics. For instance, Nemoptic of France manufactures various zero power display materials.
  • FIGS. 2 and 3 show embodiment circuit configurations suitable for passive RFIDs having VID regions.
  • FIG. 2 such shows an embodiment of RFID 10 comprising an antenna 14 , an integrated circuit chip 16 , and circuitry 18 associated with a VID region.
  • the circuitry 18 can comprise a substance which changes in some characteristic visible to a person observing the VID region when power is supplied to the substance.
  • the visible change may include, for example, one or any of a color change, contrast change and pattern change.
  • the circuitry 18 may be characterized as visual identifier circuitry. Such visual identifier circuitry may be configured to respond to power input by altering a visual identifier observable by a person looking at the VID region 12 ( FIG. 1 ) of RFID 10 .
  • the integrated circuitry 16 includes RFID circuitry, and also includes circuitry for controlling flow of power to the visual identifier circuitry 18 .
  • interrogation of RFID 10 creates power in antenna 14 .
  • Such power is directed to circuitry 16 along the path diagrammatically illustrated by arrow 17 .
  • a portion of the power reaching circuitry 16 is in turn directed from circuitry 16 to visual identifier circuitry 18 along the path diagrammatically illustrated by arrow 19 .
  • FIG. 2 also shows power flow from RFID circuitry 16 to antenna 14 along a path 15 .
  • Such power flow can be optional.
  • the flow along path 15 enables the RFID to send information out to a receiving device, in addition to receiving a signal from an interrogator.
  • the receiving device can be the same as the interrogator that sent communication to the RFID, or can be different.
  • the RFID of FIG. 2 comprises only one antenna.
  • Such antenna is configured to power both the RFID circuitry and the visual identifier circuitry.
  • FIG. 3 another embodiment of a configuration of circuitry within a passive RFID is illustrated.
  • antenna 14 is directly coupled to both integrated circuitry 16 and visual identifier circuitry 18 .
  • power flow to visual identifier circuitry 18 proceeds along a new path 21 that is direct from antenna 14 , rather than proceeding along a path from RFID circuitry 16 (such as the path 19 of FIG. 2 ).
  • FIGS. 2 and 3 may each provide advantages associated therewith for particular applications.
  • the embodiment of FIG. 2 may be preferred if it is desired to control power input to visual identification circuitry 18 .
  • the embodiment of FIG. 2 may also be preferred if it is desired to controllably display patterns or symbols that are to update or change.
  • the embodiment of FIG. 3 may be preferred if it is desired to merely have the RFID visually display that it is being interrogated.
  • the visual display may show a pattern or other indication that only lasts about as long as power is supplied to the RFID, or may change to a stable display that remains in its altered state for at least some extended period in the absence of power to the RFID.
  • FIGS. 2 and 3 depict embodiments of passive RFIDs, but visual identification techniques may also be utilized with active RFIDs.
  • FIG. 4 shows an embodiment of an RFID 10 which is an active RFID.
  • the RFID of FIG. 4 comprises the antenna 14 , integrated circuitry 16 , and visual identification circuitry 18 discussed above; and further comprises a power source 20 .
  • the power source 20 can comprise, for example, a battery.
  • a signal 21 is shown proceeding from antenna 14 to integrated circuitry 16 .
  • Power from the battery is shown by arrow 23 as being utilized to power integrated circuitry 16 .
  • Power is then directed from integrated circuitry 16 to visual identification circuitry 18 , as shown by arrow 25 .
  • power can be directed from integrated circuitry 16 to antenna 14 , as designated by arrow 27 .
  • the active RFID of FIG. 4 can be utilized alternatively to the passive RFIDs of FIGS. 2 and 3 , or in addition to the passive RFIDs.
  • the identification region 12 of FIG. 1 is described as a visual identification region. It is to be understood, however, that other user-identifiable characteristics may be used in some embodiments.
  • the other user-identifiable characteristics may be any characteristics that can be sensed by a person proximate the RFID (such as sound or touch).
  • characteristics other than visual characteristics can utilize more power than the visual characteristics, and can be more difficult to quickly and accurately locate. Thus, it may be desirable to use visual characteristics.
  • FIG. 5 illustrates a tracking system 30 which includes an interrogator 32 and a plurality of RFIDs 34 , 36 , 38 and 40 .
  • the RFIDs 34 , 36 , 38 and 40 contain VID regions 44 , 46 , 48 and 50 , respectively.
  • the interrogator 32 outputs a radio frequency signal 52 (diagrammatically illustrated by a plurality of waves) toward RFIDs 34 , 36 , 38 and 40 .
  • the RFIDs comprise a first subset corresponding to RFIDs 36 and 38 .
  • the first subset is configured to change a user-observable visible property within VID regions 46 and 48 upon interacting with RF signals from interrogator 32 .
  • the RFIDs also include a second subset corresponding to RFIDs 34 and 40 .
  • the second subset does not change a user-observable visible property upon being interrogated by the signal from interrogator 32 . In some embodiments, the second subset does not communicate with the radio frequency of the interrogator.
  • the RFIDs of the first subset are shown to have a “+” (i.e., a plus sign) formed in the VID regions 46 and 48 , while the RFIDs of the second subset (RFIDs 34 and 40 ) do not have any symbols formed in the VID regions thereof.
  • the system of FIG. 5 can be used for locating particular RFIDs within a group of RFIDs.
  • the system can be used for locating the RFIDs 36 and 38 within the group comprising RFIDs 34 , 36 , 38 and 40 .
  • the system can be utilized for locating the RFIDs 34 and 40 of such group by identifying the RFIDs which did not change upon being interrogated with the signal from interrogator 32 .
  • the system 30 can be utilized for identifying particular RFIDs by configuring a subset of the RFIDs to change a user-observable property upon interrogation, and configuring another subset which does not change the user-observable property upon such interrogation.
  • the first and second subsets of the RFIDs can then be simultaneously exposed to interrogation, and the RFIDs that changed the user-observable property can be distinguished from those that didn't to locate one of the subsets of RFIDs relative to the other.
  • the RFIDs are considered to be simultaneously exposed to interrogation by an interrogator if both are in the RF field of the interrogator at the same time.
  • momentary visual identification of all RFID tags receiving sufficient power from an electromagnetic field gives a user an observable signal of which RFID tags are within range of an interrogator.
  • Such signal can be a visual representation of the range of the interrogator, or a visual representation of the antenna power pattern when multiple tags are used. If the signal is used as a visual representation of an antenna power pattern, there can be a global command from the interrogator to the RFIDs that says “Whoever you are, if you hear me, turn on your indicator.” This may be useful for verifying functionality of an antenna installation, and/or finding minimum acceptable reader power. Both of which may be useful for setting up new installations, and for quality and/or diagnostic checks of existing installations.
  • the change in the user-observable visibly property utilized in the FIG. 5 application may be designed to use very little energy, particularly if the RFIDs are passive RFIDs.
  • the visual identification region can include one or more of electronic ink, electronic paper, ferroelectric material and polymer electrochromic material.
  • the user-observable visible property can then correspond to a user-observable change in color or pattern corresponding to a change in one or more of the electronic ink, electronic paper, ferroelectric material and polymer electrochromic material.
  • the RFIDs may be designed so that power is only required to be provided to the VID region for a very brief period of time. This enables a relatively small amount of power to be utilized to display the visible property change. If the user-observable visible property change requires power to maintain the property, the property change may only be displayed for a very brief time to reduce the amount of power consumed in showing the property change. For instance, if the “+” symbols shown in VID regions 46 and 48 of FIG. 5 require power to maintain the symbols, the symbols may only be displayed transiently. Such transient display can be for long enough for an observer to glimpse the symbols and identify which RFID devices reacted to interrogation by interrogator 32 , and yet for a duration that is really no longer than needed for such glimpse of the reacting RFIDs. For instance, in some embodiments the visible property can be displayed for less than 0.5 seconds, and in other embodiments for even less than 10 milliseconds.
  • Some electrically stimulated visible materials are known to exist in two stable states that can be interchanged with input of electrical power. Such materials can be utilized in the VID regions of the RFIDs shown in FIG. 5 . Interrogation of such RFIDs can then trigger a change in the materials from one state to another to trigger a visible property change corresponding to a new state of the materials. The new state will remain after power input to the VID region is ceased, and thus the new visible property will be stable after the power input is ceased.
  • An example visible property change is a change from a blank VID region to a VID region displaying a “+” symbol.
  • materials that exist in two stable states can be utilized to display symbols that remain within VID regions after power input to the VID regions is stopped, rather than displaying symbols that exist only transiently during the input of power to the VID regions.
  • Materials that exist in two stable states can be considered to provide a toggle mode for a display in a VID region.
  • the display can toggle between the two states at each communication with an interrogator, and can remain in either state between communications with the interrogator.
  • all of the visual identification regions that reacted to interrogation show the same visual property (the “+” symbol). Such can be effective if the purpose of the visual change is to identify which RFIDs reacted to interrogation.
  • some of the RFIDs can display a different visual property than others.
  • the particular visual property displayed by an RFID can be informative of an item tagged with the RFID, as discussed below with reference to FIGS. 7-10 .
  • FIG. 5 utilized a single interrogator.
  • FIG. 6 shows a tracking system 60 comprising a second interrogator 62 in addition to the components of the tracking system 30 of FIG. 5 .
  • the system 60 specifically comprises the first interrogator 32 discussed above with reference to FIG. 5 , and comprises the RFIDs 34 , 36 , 38 and 40 .
  • the RFIDs 36 and 38 correspond to the above-discussed first subset, and display the user-observable visible property of a “+” symbol upon interrogation from the first interrogator 32 .
  • the RFIDs 34 and 40 correspond to the above-discussed second subset, and in the embodiment of FIG.
  • the first interrogator can thus be considered to interrogate the first subset of RFIDs selectively relative to the second set, and the second interrogator can be thus be considered to interrogate the second subset of RFIDs selectively relative to the first set.
  • the interrogator 62 is shown to trigger a different visual property in the second subset of RFIDs than is triggered in the first subset by the first interrogator.
  • the symbols generated by the first and second interrogators can be the same as one another.
  • a user observing RFIDs 34 , 36 , 38 and 40 can utilize the interrogator-generated visible property changes to distinguish RFIDs that responded to the first interrogator from those that responded to the second interrogator, and vice-versa.
  • a RFID tag's visual identification changes state upon being interrogated only by certain interrogators, which are written to the RFID memory. This embodiment can be used to identify which of several interrogators are communicating with particular tags.
  • RFIDs having VID regions can be utilized to display particular information pertaining to tagged items.
  • An example of such application is discussed with reference to FIGS. 7-10 .
  • a plurality of items 70 , 72 , 74 and 76 is shown.
  • the items have RFIDs 80 , 82 , 84 and 86 associated therewith (in other words, are tagged with RFIDs 80 , 82 , 84 and 86 ).
  • the RFIDs can be affixed to the items with glue or tape. Alternatively, the RFIDs can be fixed to boxes which retain the items. Regardless, the RFIDs associated with the items move with the items through a particular process, such as, for example, a parcel or object sorting process, or mail delivery process.
  • the items 70 , 72 , 74 , and 76 are provided within range of an interrogator 90 .
  • the interrogator emits an RF signal 92 which passes across RFIDs 80 , 82 , 84 and 86 .
  • the RFIDs can emit return signals to the interrogator to pass information to the interrogator.
  • the RFIDs also have identification regions which generate patterns in response to the RFIDs being interrogated by interrogator 90 . Such is diagrammatically illustrated by lines extending across RFIDs 80 , 82 , 84 and 86 . The lines are shown extending horizontally, but it is to be understood that the lines may extend vertically, or in any other desired pattern.
  • the symbols formed on the RFIDs may be selected to be descriptive of one or more properties of the items associated with the RFIDs, and may be in a form either directly readable by a person observing the visual identification regions, or readable with appropriate equipment.
  • FIG. 9 shows an example RFID 80 before and after interrogation. Specifically, RFID 80 is shown on the left side of FIG. 9 before interrogation, and on the right side of FIG. 9 after interrogation. The interrogation has generated a bar code 83 across RFID 80 . Such bar code can be read with an appropriate reader to ascertain information about an item tagged with the RFID. The information may be selected to correspond to anything of possible interest to a person tracking the item associated with the RFID, including, for example, delivery information.
  • several of the RFIDs can display identical bar codes, particularly if the items associated with the RFIDs are being treated identically to one another at the processing stage in which the bar codes are displayed. In other applications, several of the RFIDs can display different bar codes from one another. Bar codes can be displayed in VID regions with any suitable material, and in some applications can be displayed with electronic paper.
  • FIG. 10 shows another embodiment of RFID 80 before and after interrogation, with the RFID being shown in the left side before interrogation and in the right side after interrogation.
  • the RFID has printing on its surface which labels “Origin,” “Destination,” and “Last Activity.” Interrogation by the interrogator provides information in locations (i.e., fields) proximate such printing to convey shipping information to a person observing the RFID. Specifically, the interrogated RFID indicates the point of origin, the point of destination, and the last activity that has occurred relative to the RFID.
  • the RFID may be configured to display other shipping information alternatively, or additionally, to that shown.
  • the embodiments disclosed herein can be utilized in numerous applications.
  • Conventional RFIDs typically offer no external physical indication that they have been, or are being, interrogated. A range of an interrogator is frequently not precisely known, so users can have difficulty determining which of many possible RFIDs have been read.
  • placement of indicator displays on RFIDs in accordance with the embodiments disclosed herein can permit users to visually identify which RFIDs have been, or are being, interrogated.
  • the visual identification can be in a momentary or toggle mode. If the visual identification is in a momentary mode, the visual identification can change state during interrogation (for instance, about 10 milliseconds), or for a very short time after the interrogation (for instance about 0.5 seconds). In some applications, there can be regulatory restrictions to the length of time that the visual identification is activated, such as, for example, a time of 0.5 seconds or less.
  • Interrogators can be considered to have “formal” sessions of communication with RFIDs during which data is exchanged between the interrogators and the RFIDS.
  • the visual change in a VID region may be triggered to occur during formal sessions in some applications, and in other applications the visual change may be timed to occur before or after the formal sessions. If the visual change occurs before or after a formal session, the change may be induced by power provided from the interrogator.
  • the RFID can operate in a mode to only receive the power and change the visible display, rather than to also engage in the data communication with the interrogator that would occur in a formal session.

Abstract

Some embodiments include observable properties triggered upon interrogation of RFIDs. The RFIDs can be passive RFIDs, and the observable properties can be visible changes that require little power to generate, and little or no power to maintain. The visible information can include information about items tracked with the RFIDs, such as shipping information. Some embodiments include passive RFIDs utilizing a single antenna to power an integrated-circuit chip and a visual identifier. Some embodiments include methods of locating interrogated RFIDs. Some embodiments include methods of tracking items.

Description

    CROSS-REFERENCE TO RELATED APPLICATIONS
  • This application is a divisional of U.S. application Ser. No. 11/595,683, filed on Nov. 10, 2006, the disclosure of which is incorporated herein by reference.
  • TECHNICAL FIELD
  • The present invention, in various embodiments, relates to tracking systems, passive radio frequency identification devices (RFIDs), methods of locating and identifying RFIDs, and methods of tracking items
  • BACKGROUND
  • RFIDs have numerous uses, including, for example, inventory tracking.
  • RFIDs are utilized in systems with interrogators. The interrogators communicate with the RFIDs through radio-frequency (RF) signals. The RFIDs can be either active devices or passive devices. Active devices have their own power sources, and passive devices rely solely on power from RF signals sent by the interrogators.
  • Active devices have an advantage in that they can be utilized further from an interrogator than passive devices, but have the disadvantage that the power source within the active devices has a limited lifespan. Also, active devices can be more expensive than passive devices. Accordingly, passive devices and active devices each have advantages and disadvantages that can render one type of device more suitable for a particular application than the other.
  • Present RFID systems have sufficient communications range between tag and reader such that it is possible that many tags can be present at one time within a reader antenna working volume. Thus, when the interrogator reads a tag, the user may not be able to determine which tag has been read. It could be one of many because there is no visible indicator of which tag ID corresponds with which physical tag. There exist applications, such as inventory management, where an ID number relates to one specific part. Any uncertainty or ambiguity in such systems may destroy the integrity of the inventory tracking system. Because passive tags have no power absent a reader, it has been problematic to provide a visual indicator means that persists in the absence of incident reader power on a passive tag.
  • BRIEF SUMMARY OF THE DRAWINGS
  • FIG. 1 is a diagrammatic view of an RFID embodiment.
  • FIG. 2 is a block diagram of circuitry of a passive RFID embodiment.
  • FIG. 3 is a block diagram of circuitry of another passive RFID embodiment.
  • FIG. 4 is a block diagram of circuitry of an active RFID embodiment.
  • FIG. 5 is a diagram of a wireless communication system embodiment.
  • FIG. 6 is a diagram of another wireless communication system embodiment.
  • FIG. 7 is a diagram of several tagged items at a preliminary processing stage of a tracking system embodiment.
  • FIG. 8 is a view of the tagged items of FIG. 7 shown at a tracking stage subsequent to that of FIG. 7.
  • FIG. 9 illustrates a visual identification device embodiment in two different configurations.
  • FIG. 10 illustrates another visual identification device embodiment in two different configurations.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • Various systems and methods are disclosed for incorporating observable identifiers into RFIDs. The observable identifiers can be utilized for determining which RFIDs within a group of RFIDs are interrogated by a particular interrogator. In some embodiments, the observable indicators can be visible indicators which provide information about items tracked with RFIDs. Such information can be displayed as a bar code. Alternatively, or additionally, the information can be displayed alphanumerically. An example application utilizing an alphanumeric display is the visual display of shipping information (for instance, origin, destination or time of travel information). Alternatively, or additionally, a single ON/OFF visual indicator area on an RFID tag may serve as an indicator that an interrogator is presently communicating with that tag by its ID number. Alternatively, or additionally, multiple ON/OFF visual indicator areas on an RFID tag may serve as an indicator that an interrogator is presently communicating with that tag by its ID number.
  • An example of a radio frequency identification device (RFID) having a visual indicator associated therewith is shown in FIG. 1 as device 10. The device 10 comprises a surface 11. A visual identification (VID) region 12 is shown formed along a portion of such surface. Although the shown VID region comprises only a portion of surface 11, it is to be understood that the visual identification region may comprise the entirety of surface 11.
  • The VID region 12 comprises one or more compositions that can be modified in some selected characteristic so that a change in the VID region is perceptible to a person looking at RFID 10. Such change may be a change in color, and/or a change in an observed pattern. Suitable compositions for utilization in VID region 12 are compositions which create visible changes upon being subjected to electrical power. It can be preferred that the visible changes be induced with very little power input. For instance, if RFID 10 is a passive device, there will be little power available to cause a change. Alternatively, if device 10 is an active device, there will be more power, but it may still be preferred that as little power as possible be utilized to change observable properties within region 12 so that charge can be conserved within the power reservoir of the active device.
  • In some applications, very low power electronic displays (which can be referred to zero-power electronic displays if the displays convey information in the absence of power) are utilized within the VID regions. Very low power displays can be particularly useful for passive RFIDs, since passive RFIDs have little power available with which to perform enunciation (with enunciation being indication by the RFID that it has received a signal from an interrogator). Passive RFIDs get all of their power from an interrogator's electromagnetic field, and thus are generally not powered (except for a little charge remaining on a power supply capacitor) when an interrogator field is absent. Thus, if a VID region is going to maintain a perceptible changed state, such as a visible pattern, in the absence of an interrogator's electromagnetic field, such should occur with zero power. Examples of zero-power display technologies are electronic ink, electronic paper, ferroelectrics, and polymer electrochromics. For instance, Nemoptic of France manufactures various zero power display materials.
  • FIGS. 2 and 3 show embodiment circuit configurations suitable for passive RFIDs having VID regions.
  • Referring first to FIG. 2, such shows an embodiment of RFID 10 comprising an antenna 14, an integrated circuit chip 16, and circuitry 18 associated with a VID region.
  • The circuitry 18 can comprise a substance which changes in some characteristic visible to a person observing the VID region when power is supplied to the substance. The visible change may include, for example, one or any of a color change, contrast change and pattern change. The circuitry 18 may be characterized as visual identifier circuitry. Such visual identifier circuitry may be configured to respond to power input by altering a visual identifier observable by a person looking at the VID region 12 (FIG. 1) of RFID 10.
  • The integrated circuitry 16 includes RFID circuitry, and also includes circuitry for controlling flow of power to the visual identifier circuitry 18. In operation, interrogation of RFID 10 creates power in antenna 14. Such power is directed to circuitry 16 along the path diagrammatically illustrated by arrow 17. A portion of the power reaching circuitry 16 is in turn directed from circuitry 16 to visual identifier circuitry 18 along the path diagrammatically illustrated by arrow 19. FIG. 2 also shows power flow from RFID circuitry 16 to antenna 14 along a path 15. Such power flow can be optional. When present, the flow along path 15 enables the RFID to send information out to a receiving device, in addition to receiving a signal from an interrogator. The receiving device can be the same as the interrogator that sent communication to the RFID, or can be different.
  • Notably, the RFID of FIG. 2 comprises only one antenna. Such antenna is configured to power both the RFID circuitry and the visual identifier circuitry.
  • Referring to FIG. 3, another embodiment of a configuration of circuitry within a passive RFID is illustrated. In the configuration of FIG. 3, antenna 14 is directly coupled to both integrated circuitry 16 and visual identifier circuitry 18. Thus, power flow to visual identifier circuitry 18 proceeds along a new path 21 that is direct from antenna 14, rather than proceeding along a path from RFID circuitry 16 (such as the path 19 of FIG. 2).
  • The embodiments of FIGS. 2 and 3 may each provide advantages associated therewith for particular applications. The embodiment of FIG. 2 may be preferred if it is desired to control power input to visual identification circuitry 18. The embodiment of FIG. 2 may also be preferred if it is desired to controllably display patterns or symbols that are to update or change. In contrast, the embodiment of FIG. 3 may be preferred if it is desired to merely have the RFID visually display that it is being interrogated. As discussed in more detail below, the visual display may show a pattern or other indication that only lasts about as long as power is supplied to the RFID, or may change to a stable display that remains in its altered state for at least some extended period in the absence of power to the RFID.
  • FIGS. 2 and 3 depict embodiments of passive RFIDs, but visual identification techniques may also be utilized with active RFIDs. FIG. 4 shows an embodiment of an RFID 10 which is an active RFID.
  • The RFID of FIG. 4 comprises the antenna 14, integrated circuitry 16, and visual identification circuitry 18 discussed above; and further comprises a power source 20. The power source 20 can comprise, for example, a battery.
  • A signal 21 is shown proceeding from antenna 14 to integrated circuitry 16. Power from the battery is shown by arrow 23 as being utilized to power integrated circuitry 16. Power is then directed from integrated circuitry 16 to visual identification circuitry 18, as shown by arrow 25. Further, power can be directed from integrated circuitry 16 to antenna 14, as designated by arrow 27.
  • The active RFID of FIG. 4 can be utilized alternatively to the passive RFIDs of FIGS. 2 and 3, or in addition to the passive RFIDs.
  • In the discussion of FIGS. 1-4, the identification region 12 of FIG. 1 is described as a visual identification region. It is to be understood, however, that other user-identifiable characteristics may be used in some embodiments. The other user-identifiable characteristics may be any characteristics that can be sensed by a person proximate the RFID (such as sound or touch). However, characteristics other than visual characteristics can utilize more power than the visual characteristics, and can be more difficult to quickly and accurately locate. Thus, it may be desirable to use visual characteristics.
  • The RFIDs of FIGS. 1-4 can be utilized in inventory or other object tracking systems. FIG. 5 illustrates a tracking system 30 which includes an interrogator 32 and a plurality of RFIDs 34, 36, 38 and 40. The RFIDs 34, 36, 38 and 40 contain VID regions 44, 46, 48 and 50, respectively.
  • The interrogator 32 outputs a radio frequency signal 52 (diagrammatically illustrated by a plurality of waves) toward RFIDs 34, 36, 38 and 40.
  • The RFIDs comprise a first subset corresponding to RFIDs 36 and 38. The first subset is configured to change a user-observable visible property within VID regions 46 and 48 upon interacting with RF signals from interrogator 32. The RFIDs also include a second subset corresponding to RFIDs 34 and 40. The second subset does not change a user-observable visible property upon being interrogated by the signal from interrogator 32. In some embodiments, the second subset does not communicate with the radio frequency of the interrogator. The RFIDs of the first subset (RFIDs 36 and 38) are shown to have a “+” (i.e., a plus sign) formed in the VID regions 46 and 48, while the RFIDs of the second subset (RFIDs 34 and 40) do not have any symbols formed in the VID regions thereof.
  • The system of FIG. 5 can be used for locating particular RFIDs within a group of RFIDs. For instance, the system can be used for locating the RFIDs 36 and 38 within the group comprising RFIDs 34, 36, 38 and 40. Alternatively, the system can be utilized for locating the RFIDs 34 and 40 of such group by identifying the RFIDs which did not change upon being interrogated with the signal from interrogator 32. In any event, the system 30 can be utilized for identifying particular RFIDs by configuring a subset of the RFIDs to change a user-observable property upon interrogation, and configuring another subset which does not change the user-observable property upon such interrogation. The first and second subsets of the RFIDs can then be simultaneously exposed to interrogation, and the RFIDs that changed the user-observable property can be distinguished from those that didn't to locate one of the subsets of RFIDs relative to the other. The RFIDs are considered to be simultaneously exposed to interrogation by an interrogator if both are in the RF field of the interrogator at the same time.
  • In some embodiments of the FIG. 5 application, momentary visual identification of all RFID tags receiving sufficient power from an electromagnetic field gives a user an observable signal of which RFID tags are within range of an interrogator. Such signal can be a visual representation of the range of the interrogator, or a visual representation of the antenna power pattern when multiple tags are used. If the signal is used as a visual representation of an antenna power pattern, there can be a global command from the interrogator to the RFIDs that says “Whoever you are, if you hear me, turn on your indicator.” This may be useful for verifying functionality of an antenna installation, and/or finding minimum acceptable reader power. Both of which may be useful for setting up new installations, and for quality and/or diagnostic checks of existing installations.
  • The change in the user-observable visibly property utilized in the FIG. 5 application may be designed to use very little energy, particularly if the RFIDs are passive RFIDs. Accordingly, the visual identification region can include one or more of electronic ink, electronic paper, ferroelectric material and polymer electrochromic material. The user-observable visible property can then correspond to a user-observable change in color or pattern corresponding to a change in one or more of the electronic ink, electronic paper, ferroelectric material and polymer electrochromic material.
  • The RFIDs may be designed so that power is only required to be provided to the VID region for a very brief period of time. This enables a relatively small amount of power to be utilized to display the visible property change. If the user-observable visible property change requires power to maintain the property, the property change may only be displayed for a very brief time to reduce the amount of power consumed in showing the property change. For instance, if the “+” symbols shown in VID regions 46 and 48 of FIG. 5 require power to maintain the symbols, the symbols may only be displayed transiently. Such transient display can be for long enough for an observer to glimpse the symbols and identify which RFID devices reacted to interrogation by interrogator 32, and yet for a duration that is really no longer than needed for such glimpse of the reacting RFIDs. For instance, in some embodiments the visible property can be displayed for less than 0.5 seconds, and in other embodiments for even less than 10 milliseconds.
  • Some electrically stimulated visible materials (such as some electronic inks and polymer electrochromic materials) are known to exist in two stable states that can be interchanged with input of electrical power. Such materials can be utilized in the VID regions of the RFIDs shown in FIG. 5. Interrogation of such RFIDs can then trigger a change in the materials from one state to another to trigger a visible property change corresponding to a new state of the materials. The new state will remain after power input to the VID region is ceased, and thus the new visible property will be stable after the power input is ceased. An example visible property change is a change from a blank VID region to a VID region displaying a “+” symbol. Thus, materials that exist in two stable states can be utilized to display symbols that remain within VID regions after power input to the VID regions is stopped, rather than displaying symbols that exist only transiently during the input of power to the VID regions. Materials that exist in two stable states can be considered to provide a toggle mode for a display in a VID region. The display can toggle between the two states at each communication with an interrogator, and can remain in either state between communications with the interrogator.
  • In the application of FIG. 5, all of the visual identification regions that reacted to interrogation show the same visual property (the “+” symbol). Such can be effective if the purpose of the visual change is to identify which RFIDs reacted to interrogation. In other applications, some of the RFIDs can display a different visual property than others. In such applications, the particular visual property displayed by an RFID can be informative of an item tagged with the RFID, as discussed below with reference to FIGS. 7-10.
  • The application of FIG. 5 utilized a single interrogator. Other applications can utilize a plurality of interrogators. For instance, FIG. 6 shows a tracking system 60 comprising a second interrogator 62 in addition to the components of the tracking system 30 of FIG. 5. The system 60 specifically comprises the first interrogator 32 discussed above with reference to FIG. 5, and comprises the RFIDs 34, 36, 38 and 40. The RFIDs 36 and 38 correspond to the above-discussed first subset, and display the user-observable visible property of a “+” symbol upon interrogation from the first interrogator 32. The RFIDs 34 and 40 correspond to the above-discussed second subset, and in the embodiment of FIG. 6 respond to interrogation by the second interrogator 62 to display a “0” symbol. The first subset of RFIDs does not respond to the interrogation by the second interrogator, and the second subset of RFIDs does not respond to interrogation by the first interrogator. The first interrogator can thus be considered to interrogate the first subset of RFIDs selectively relative to the second set, and the second interrogator can be thus be considered to interrogate the second subset of RFIDs selectively relative to the first set.
  • The interrogator 62 is shown to trigger a different visual property in the second subset of RFIDs than is triggered in the first subset by the first interrogator. In other applications, the symbols generated by the first and second interrogators can be the same as one another.
  • A user observing RFIDs 34, 36, 38 and 40 can utilize the interrogator-generated visible property changes to distinguish RFIDs that responded to the first interrogator from those that responded to the second interrogator, and vice-versa. In the embodiment of FIG. 6, a RFID tag's visual identification changes state upon being interrogated only by certain interrogators, which are written to the RFID memory. This embodiment can be used to identify which of several interrogators are communicating with particular tags.
  • RFIDs having VID regions can be utilized to display particular information pertaining to tagged items. An example of such application is discussed with reference to FIGS. 7-10.
  • Referring to FIG. 7, a plurality of items 70, 72, 74 and 76 is shown. The items have RFIDs 80, 82, 84 and 86 associated therewith (in other words, are tagged with RFIDs 80, 82, 84 and 86). The RFIDs can be affixed to the items with glue or tape. Alternatively, the RFIDs can be fixed to boxes which retain the items. Regardless, the RFIDs associated with the items move with the items through a particular process, such as, for example, a parcel or object sorting process, or mail delivery process.
  • Referring to FIG. 8, the items 70, 72, 74, and 76 are provided within range of an interrogator 90. The interrogator emits an RF signal 92 which passes across RFIDs 80, 82, 84 and 86. The RFIDs can emit return signals to the interrogator to pass information to the interrogator. The RFIDs also have identification regions which generate patterns in response to the RFIDs being interrogated by interrogator 90. Such is diagrammatically illustrated by lines extending across RFIDs 80, 82, 84 and 86. The lines are shown extending horizontally, but it is to be understood that the lines may extend vertically, or in any other desired pattern.
  • The symbols formed on the RFIDs may be selected to be descriptive of one or more properties of the items associated with the RFIDs, and may be in a form either directly readable by a person observing the visual identification regions, or readable with appropriate equipment. For instance, FIG. 9 shows an example RFID 80 before and after interrogation. Specifically, RFID 80 is shown on the left side of FIG. 9 before interrogation, and on the right side of FIG. 9 after interrogation. The interrogation has generated a bar code 83 across RFID 80. Such bar code can be read with an appropriate reader to ascertain information about an item tagged with the RFID. The information may be selected to correspond to anything of possible interest to a person tracking the item associated with the RFID, including, for example, delivery information. In some applications, several of the RFIDs can display identical bar codes, particularly if the items associated with the RFIDs are being treated identically to one another at the processing stage in which the bar codes are displayed. In other applications, several of the RFIDs can display different bar codes from one another. Bar codes can be displayed in VID regions with any suitable material, and in some applications can be displayed with electronic paper.
  • FIG. 10 shows another embodiment of RFID 80 before and after interrogation, with the RFID being shown in the left side before interrogation and in the right side after interrogation. The RFID has printing on its surface which labels “Origin,” “Destination,” and “Last Activity.” Interrogation by the interrogator provides information in locations (i.e., fields) proximate such printing to convey shipping information to a person observing the RFID. Specifically, the interrogated RFID indicates the point of origin, the point of destination, and the last activity that has occurred relative to the RFID. The RFID may be configured to display other shipping information alternatively, or additionally, to that shown.
  • The embodiments disclosed herein can be utilized in numerous applications. Conventional RFIDs typically offer no external physical indication that they have been, or are being, interrogated. A range of an interrogator is frequently not precisely known, so users can have difficulty determining which of many possible RFIDs have been read. However, placement of indicator displays on RFIDs in accordance with the embodiments disclosed herein can permit users to visually identify which RFIDs have been, or are being, interrogated. The visual identification can be in a momentary or toggle mode. If the visual identification is in a momentary mode, the visual identification can change state during interrogation (for instance, about 10 milliseconds), or for a very short time after the interrogation (for instance about 0.5 seconds). In some applications, there can be regulatory restrictions to the length of time that the visual identification is activated, such as, for example, a time of 0.5 seconds or less.
  • Interrogators can be considered to have “formal” sessions of communication with RFIDs during which data is exchanged between the interrogators and the RFIDS. The visual change in a VID region may be triggered to occur during formal sessions in some applications, and in other applications the visual change may be timed to occur before or after the formal sessions. If the visual change occurs before or after a formal session, the change may be induced by power provided from the interrogator. The RFID can operate in a mode to only receive the power and change the visible display, rather than to also engage in the data communication with the interrogator that would occur in a formal session.
  • In compliance with the statute, the subject matter disclosed herein has been described in language more or less specific as to structural and methodical features. It is to be understood, however, that the claims are not limited to the specific features shown and described, since the means herein disclosed comprise example embodiments. The claims are thus to be afforded full scope as literally worded, and to be appropriately interpreted in accordance with the doctrine of equivalents.

Claims (34)

1. A tracking system, comprising:
an interrogator; and
a plurality of passive RFIDs, at least one of the passive RFIDs being configured to change an observable visible property responsive to interrogation by the interrogator, the observable visible property being a transient change that ceases without power input.
2. The tracking system of claim 1 wherein the observable visible property transient change has a duration of less than 0.5 seconds.
3. The tracking system of claim 1 wherein the observable visible property transient change has a duration of less than 10 milliseconds.
4. A tracking system, comprising:
an interrogator; and
a plurality of RFIDs configured to change an observable property in the same way upon being interrogated by the interrogator.
5. The tracking system of claim 4 wherein the observable property is a visible property.
6. The tracking system of claim 4 wherein the RFIDs are passive RFIDs, the observable property is a visible property, and the changed visible property is stable without power input from the interrogator.
7. The tracking system of claim 4 wherein the observable property is a transient visible property that ceases without power input from the interrogator.
8. The tracking system of claim 4 wherein the observable property is a transient visible property that has a duration of less than 0.5 seconds.
9. The tracking system of claim 4 wherein the observable property is a transient visible property that has a duration of less than 10 milliseconds.
10. A tracking system, comprising:
an interrogator; and
at least one RFID which is configured to display a bar code responsive to interrogation by the interrogator.
11. The tracking system of claim 10 wherein the at least one RFID comprises a plurality of RFIDs configured to display bar codes responsive to interrogation by the interrogator.
12. The tracking system of claim 11 wherein at least two of the RFIDs of the plurality are configured to display the same bar code as one another.
13. The tracking system of claim 11 wherein at least two of the RFIDs of the plurality are configured to display different bar codes from one another.
14. The tracking system of claim 11 wherein the RFIDs are passive RFIDs.
15. The tracking system of claim 11 wherein the RFIDs are active RFIDs.
16. A tracking system, comprising:
an interrogator; and
at least one RFID which is configured to display shipping information responsive to interrogation by the interrogator.
17. The tracking system of claim 16 wherein the at least one RFID is a passive RFID.
18. The tracking system of claim 16 wherein the at least one RFID is an active RFID.
19. A method of locating interrogated RFIDs, comprising:
providing an interrogator and a plurality of passive RFIDs, at least one of the passive RFIDs being configured to change an observable visible property responsive to interrogation by the interrogator; the observable visible property change being a transient change that has a duration of less than 0.5 seconds; and
interrogating said at least one of the passive RFIDs with the interrogator to trigger the observable visible property.
20. The method of claim 19 wherein the providing the passive RFIDs comprises providing passive RFIDs which include visible identification regions comprising at least one of electronic ink, electronic paper, ferroelectric material, and polymer electrochromic material; and wherein the observable visible property change includes an observable change in the at least one of electronic ink, electronic paper, ferroelectric material, and polymer electrochromic material.
21. The method of claim 19 wherein the interrogating triggers the observable visible property transient change to have a duration of less than 10 milliseconds.
22. A method of identifying interrogated RFIDs, comprising:
providing an interrogator and a plurality of RFIDs, all of said RFIDs being configured to change an observable property in the same way upon being interrogated by the interrogator; and
interrogating at least some of the RFIDs to trigger the observable property change within all of the interrogated RFIDs.
23. The method of claim 22 wherein only some of the RFIDs are interrogated, and further comprising observing the triggered observable property change to ascertain an antenna power pattern of the interrogator.
24. The method of claim 22 wherein the interrogating to trigger the observable property change comprises triggering a visible property change.
25. The method of claim 24 wherein the providing the RFIDs comprises providing RFIDs which include visible identification regions comprising at least one of electronic ink, electronic paper, ferroelectric material, and polymer electrochromic material; and wherein the triggering the visible property change includes triggering an observable change in the at least one of electronic ink, electronic paper, ferroelectric material, and polymer electrochromic material.
26. The method of claim 22 wherein the providing the RFIDs comprises providing passive RFIDs; the interrogating to trigger the observable property change comprises triggering a visible property change; and the triggered visible property change remains without power input after the triggering.
27. The method of claim 22 wherein the interrogating to trigger the observable property change comprises triggering a transient visible property change that has a duration of less than 0.5 seconds.
28. The method of claim 22 wherein the interrogating to trigger the observable property change comprises triggering a transient visible property change that has a duration of less than 10 milliseconds.
29. A method of tracking items, comprising:
providing an interrogator;
providing RFIDs associated with the items; and
interrogating the RFIDs to cause the RFIDS to display bar codes which provide information regarding the items associated with the RFIDs.
30. The method of claim 29 wherein the providing the RFIDs comprises providing RFIDs which include visible identification regions comprising at least one of electronic ink, electronic paper, ferroelectric material, and polymer electrochromic material; and wherein the causing the RFIDs to display bar codes includes causing a change in the at least one of electronic ink, electronic paper, ferroelectric material, and polymer electrochromic material.
31. The method of claim 29 wherein the interrogating to cause the RFIDs to display the bar codes comprises causing at least two of the RFIDs to display the same bar code as one another.
32. The method of claim 29 wherein the interrogating to cause the RFIDs to display the bar codes comprises causing at least two of the RFIDs to display different bar codes from one another.
33. The method of claim 29 wherein the RFIDs include passive RFIDs.
34. The method of claim 29 wherein the RFIDs include active RFIDs.
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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8485430B2 (en) 2011-12-06 2013-07-16 Honeywell International, Inc. Hand held bar code readers or mobile computers with cloud computing services
US20140085084A1 (en) * 2012-09-27 2014-03-27 Loran Technologies, Inc Passive active battery saver tracking system
CN103761846A (en) * 2013-12-05 2014-04-30 镇江高科科技信息咨询有限公司 Bundled wireless collector
US8727225B2 (en) 2012-04-20 2014-05-20 Honeywell International Inc. System and method for calibration and mapping of real-time location data
US8881982B2 (en) 2012-04-20 2014-11-11 Honeywell Scanning & Mobility Portable encoded information reading terminal configured to acquire images
US9013275B2 (en) 2012-04-20 2015-04-21 Hand Held Products, Inc. Portable encoded information reading terminal configured to adjust transmit power level
US9041518B2 (en) 2012-01-26 2015-05-26 Hand Held Products, Inc. Portable RFID reading terminal with visual indication of scan trace
US9064254B2 (en) 2012-05-17 2015-06-23 Honeywell International Inc. Cloud-based system for reading of decodable indicia
US9092683B2 (en) 2012-07-10 2015-07-28 Honeywell International Inc. Cloud-based system for processing of decodable indicia
US9443119B2 (en) 2012-04-20 2016-09-13 Hand Held Products, Inc. Portable encoded information reading terminal configured to locate groups of RFID tags
US9536219B2 (en) 2012-04-20 2017-01-03 Hand Held Products, Inc. System and method for calibration and mapping of real-time location data
US9558386B2 (en) 2012-05-15 2017-01-31 Honeywell International, Inc. Encoded information reading terminal configured to pre-process images
US9594939B2 (en) 2013-09-09 2017-03-14 Hand Held Products, Inc. Initial point establishment using an image of a portion of an object
US9619683B2 (en) 2014-12-31 2017-04-11 Hand Held Products, Inc. Portable RFID reading terminal with visual indication of scan trace
US10392096B2 (en) * 2015-05-12 2019-08-27 Airbus Operations S.A.S. Access device provided with a folding door enabling secure communication between at least two zones of an enclosure

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7071824B2 (en) 1999-07-29 2006-07-04 Micron Technology, Inc. Radio frequency identification devices, remote communication devices, identification systems, communication methods, and identification methods
US8024063B2 (en) * 2007-08-17 2011-09-20 Siemens Industry, Inc. Process and system for tracking of mail
US8608068B2 (en) * 2007-12-05 2013-12-17 Siemens Industry, Inc. Mail processing tracking system and method
KR20100036089A (en) * 2008-09-29 2010-04-07 삼성전자주식회사 Radio frequency identification display pixel, display panel and display apparatus using the rfid display pixel
US8231062B1 (en) * 2010-10-07 2012-07-31 The Boeing Company Formable RFID tag
US8823554B2 (en) 2010-12-09 2014-09-02 The Boeing Company Managing a plurality of radio frequency identification devices
US8791823B2 (en) 2011-06-03 2014-07-29 The Boeing Company Aircraft part control system
US8599009B2 (en) 2011-08-16 2013-12-03 Elwha Llc Systematic distillation of status data relating to regimen compliance
US9152912B2 (en) * 2011-10-13 2015-10-06 Asia Vital Components Co., Ltd. Smart card capable of independently displaying information
FI127537B (en) * 2012-04-11 2018-08-31 Marisense Oy Electronic label tag and electronic label tag system
US8807425B2 (en) 2012-04-27 2014-08-19 Alvin C. Saywa System, process and computer writeable medium incorporating any of standard or adhesive attachable tags incorporating a unique identifiable number or alternately a digitally downloadable tag and application having GPS locating abilities and which are combined with a website or mobile application for registering and assisting in retrieval of tagged valuables or assets
WO2014013439A1 (en) 2012-07-16 2014-01-23 Tagsys Rfid electronic tag
US9928696B2 (en) 2015-12-30 2018-03-27 Immersion Corporation Externally-activated haptic devices and systems

Citations (95)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4075632A (en) * 1974-08-27 1978-02-21 The United States Of America As Represented By The United States Department Of Energy Interrogation, and detection system
US4223830A (en) * 1978-08-18 1980-09-23 Walton Charles A Identification system
US4236068A (en) * 1979-03-29 1980-11-25 Walton Charles A Personal identification and signaling system
US4476469A (en) * 1980-11-14 1984-10-09 Lander David R Means for assisting in locating an object
US4675656A (en) * 1984-03-16 1987-06-23 Narcisse Bernadine O Out-of-range personnel monitor and alarm
US4926182A (en) * 1986-05-30 1990-05-15 Sharp Kabushiki Kaisha Microwave data transmission apparatus
US5087906A (en) * 1990-03-05 1992-02-11 Motorola, Inc. Selective call receiver having a light channel for providing a visual alert
US5113183A (en) * 1987-06-16 1992-05-12 Casio Computer Co., Ltd. Remote code transmission system between a nameplate apparatus and a data processing apparatus
US5119069A (en) * 1989-08-07 1992-06-02 Shmuel Hershkovitz Apparatus and method for locating boundaries of detection zones covered by a passive infrared detection system
US5151684A (en) * 1991-04-12 1992-09-29 Johnsen Edward L Electronic inventory label and security apparatus
US5214410A (en) * 1989-07-10 1993-05-25 Csir Location of objects
US5337041A (en) * 1992-04-13 1994-08-09 Lorri Friedman Personal safety guard system for stray person or pet
US5416486A (en) * 1993-11-08 1995-05-16 Apti, Inc. Identification/security tag system employing electronic doppler shifting and/or rectenna structure
US5450070A (en) * 1992-03-17 1995-09-12 Massar; Sheppard Electronic missing file locator system
US5539393A (en) * 1991-03-22 1996-07-23 Esel-Krabbe Systems A/S Information system
US5550547A (en) * 1994-09-12 1996-08-27 International Business Machines Corporation Multiple item radio frequency tag identification protocol
US5565858A (en) * 1994-09-14 1996-10-15 Northrop Grumman Corporation Electronic inventory system for stacked containers
US5570080A (en) * 1992-04-24 1996-10-29 Toshio Inoue Theft prevention tab device having alarm mechanism housed therein
US5572653A (en) * 1989-05-16 1996-11-05 Rest Manufacturing, Inc. Remote electronic information display system for retail facility
US5581257A (en) * 1991-09-24 1996-12-03 Gordian Holding Corporation Radio frequency automatic identification system
US5606323A (en) * 1995-08-31 1997-02-25 International Business Machines Corporation Diode modulator for radio frequency transponder
US5617060A (en) * 1994-04-28 1997-04-01 Qualcomm Incorporated Method and apparatus for automatic gain control and DC offset cancellation in quadrature receiver
US5621412A (en) * 1994-04-26 1997-04-15 Texas Instruments Incorporated Multi-stage transponder wake-up, method and structure
US5649295A (en) * 1995-06-19 1997-07-15 Lucent Technologies Inc. Dual mode modulated backscatter system
US5649296A (en) * 1995-06-19 1997-07-15 Lucent Technologies Inc. Full duplex modulated backscatter system
US5652569A (en) * 1994-09-02 1997-07-29 Paul Joseph Gerstenberger Child alarm
US5656998A (en) * 1993-08-31 1997-08-12 Kubota Corporation Detector for theft prevention
US5673023A (en) * 1996-06-03 1997-09-30 Smith; Bradley K. Locating system with both visual and voice simulated indication capabilities
US5686902A (en) * 1990-06-15 1997-11-11 Texas Instruments Incorporated Communication system for communicating with tags
US5689238A (en) * 1996-03-08 1997-11-18 Lucent Technologies, Inc. Object locator system and methods therefor
US5689123A (en) * 1994-04-07 1997-11-18 Sdl, Inc. III-V aresenide-nitride semiconductor materials and devices
US5689240A (en) * 1996-06-05 1997-11-18 C.O.P. Corp. Child monitor system
US5742238A (en) * 1995-09-01 1998-04-21 Emtrak, Inc. System for communication between a central controller and items in a factory using infrared light
US5771002A (en) * 1997-03-21 1998-06-23 The Board Of Trustees Of The Leland Stanford Junior University Tracking system using radio frequency signals
US5777561A (en) * 1996-09-30 1998-07-07 International Business Machines Corporation Method of grouping RF transponders
US5787174A (en) * 1992-06-17 1998-07-28 Micron Technology, Inc. Remote identification of integrated circuit
US5796351A (en) * 1995-04-04 1998-08-18 Fujitsu Limited System for providing information about exhibition objects
US5841770A (en) * 1992-12-15 1998-11-24 Micron Technology, Inc. Data communication system using indentification protocol
US5850181A (en) * 1996-04-03 1998-12-15 International Business Machines Corporation Method of transporting radio frequency power to energize radio frequency identification transponders
US5850187A (en) * 1996-03-27 1998-12-15 Amtech Corporation Integrated electronic tag reader and wireless communication link
US5861817A (en) * 1997-07-02 1999-01-19 Douglas A. Palmer System for, and method of, displaying prices on tags in supermarkets
US5874902A (en) * 1996-07-29 1999-02-23 International Business Machines Corporation Radio frequency identification transponder with electronic circuit enabling/disabling capability
US5887176A (en) * 1996-06-28 1999-03-23 Randtec, Inc. Method and system for remote monitoring and tracking of inventory
US5905429A (en) * 1997-04-25 1999-05-18 City Of Lights, Inc. Audio label
US5912632A (en) * 1997-01-08 1999-06-15 International Business Machines Corporation Single chip RF tag oscillator circuit synchronized by base station modulation frequency
US5929778A (en) * 1994-11-10 1999-07-27 Rikagaku Kenkyusho Data carrier system
US5939981A (en) * 1998-01-28 1999-08-17 Renney; Marjorie Item locator with attachable receiver/transmitter
US5940006A (en) * 1995-12-12 1999-08-17 Lucent Technologies Inc. Enhanced uplink modulated backscatter system
US5949328A (en) * 1995-03-03 1999-09-07 Latty; James A. Apparatus and method for locatable encoding alarms
US5952922A (en) * 1996-12-31 1999-09-14 Lucent Technologies Inc. In-building modulated backscatter system
US5963177A (en) * 1997-05-16 1999-10-05 Micron Communications, Inc. Methods of enhancing electronmagnetic radiation properties of encapsulated circuit, and related devices
US5963133A (en) * 1997-07-18 1999-10-05 Monjo; Nicolas Electronic tag
US5966082A (en) * 1997-05-23 1999-10-12 Intemec Ip Corp. Method of flagging partial write in RF tags
US5988510A (en) * 1997-02-13 1999-11-23 Micron Communications, Inc. Tamper resistant smart card and method of protecting data in a smart card
US6008727A (en) * 1998-09-10 1999-12-28 Xerox Corporation Selectively enabled electronic tags
US6023610A (en) * 1996-12-18 2000-02-08 Micron Technology, Inc. Communication system including diversity antenna queuing
US6024285A (en) * 1997-08-19 2000-02-15 Micron Technology, Inc. Wireless communication devices and methods of forming wireless communication devices
US6027027A (en) * 1996-05-31 2000-02-22 Lucent Technologies Inc. Luggage tag assembly
US6031459A (en) * 1998-07-22 2000-02-29 Micron Technology, Inc. Wireless communication devices, radio frequency identification devices, and methods of forming wireless communication devices and radio frequency identification devices
US6052062A (en) * 1997-08-20 2000-04-18 Micron Technology, Inc. Cards, communication devices, and methods of forming and encoding visibly perceptible information on the same
US6078260A (en) * 1998-12-21 2000-06-20 Sony Corporation Method and apparatus for keeping track of children
US6084512A (en) * 1998-10-02 2000-07-04 Lucent Technologies, Inc. Method and apparatus for electronic labeling and localizing
US6130602A (en) * 1996-05-13 2000-10-10 Micron Technology, Inc. Radio frequency data communications device
US6130623A (en) * 1996-12-31 2000-10-10 Lucent Technologies Inc. Encryption for modulated backscatter systems
US6133836A (en) * 1998-02-27 2000-10-17 Micron Technology, Inc. Wireless communication and identification packages, communication systems, methods of communicating, and methods of forming a communication device
US6133832A (en) * 1998-10-22 2000-10-17 Winder; Jeffrey S. Article location system
US6133830A (en) * 1998-06-19 2000-10-17 Lexent Technologies, Inc. Motion sensitive anti-theft device with alarm screening
US6137422A (en) * 1999-05-21 2000-10-24 Micron Technology, Inc. Communications system and method with D/A converter
US6147602A (en) * 1998-03-11 2000-11-14 Bender; Sheldon Luggage locator system
US6150921A (en) * 1996-10-17 2000-11-21 Pinpoint Corporation Article tracking system
US6184789B1 (en) * 1999-06-22 2001-02-06 Xerox Corporation Method and apparatus for visually determining object location
US6198392B1 (en) * 1999-02-10 2001-03-06 Micron Technology, Inc. Communications system and method with A/D converter
US6255951B1 (en) * 1996-12-20 2001-07-03 Carlos De La Huerga Electronic identification bracelet
US6275142B1 (en) * 1998-09-15 2001-08-14 International Business Machines Corporation Interactive enhancement for printed books
US6289209B1 (en) * 1996-12-18 2001-09-11 Micron Technology, Inc. Wireless communication system, radio frequency communications system, wireless communications method, radio frequency communications method
US6297737B1 (en) * 2000-04-03 2001-10-02 Ericsson Inc Object locating system
US6304183B1 (en) * 2000-12-15 2001-10-16 Charles O. Causey Suitcase locating device
US6327017B2 (en) * 1995-11-08 2001-12-04 Nemoptic S.A. Bistable liquid crystal display device in which nematic liquid crystal has monostable anchorings
US6326889B1 (en) * 1999-07-29 2001-12-04 Micron Technology, Inc. Radio frequency identification device and methods of determining a communication range of an interrogator of a wireless identification system
US6333690B1 (en) * 1995-03-29 2001-12-25 Medical Tracking Systems Wide area multipurpose tracking system
US6354493B1 (en) * 1999-12-23 2002-03-12 Sensormatic Electronics Corporation System and method for finding a specific RFID tagged article located in a plurality of RFID tagged articles
US6452573B1 (en) * 1997-05-07 2002-09-17 Nemoptic, S.A. Liquid crystal device comprising anchoring means on at least one confinement plate providing a degenerated orientation
US6459376B2 (en) * 1999-07-29 2002-10-01 Micron Technology, Inc. Radio frequency identification devices, remote communication devices, wireless communication systems, and methods of indicating operation
US6480699B1 (en) * 1998-08-28 2002-11-12 Woodtoga Holdings Company Stand-alone device for transmitting a wireless signal containing data from a memory or a sensor
US6486794B1 (en) * 1996-02-26 2002-11-26 Motorola, Inc. Method of locating a subscriber unit within the coverage area of a communication system
US6566997B1 (en) * 1999-12-03 2003-05-20 Hid Corporation Interference control method for RFID systems
US6621417B2 (en) * 2001-08-09 2003-09-16 Edgar Alan Duncan Passive RFID transponder/reader system and method for hidden obstacle detection and avoidance
US6795146B2 (en) * 2000-05-12 2004-09-21 Nemoptic Bistable device for reflection display with inverse contrast
US6831716B2 (en) * 2000-05-12 2004-12-14 Nemoptic Reflective bistable display device incorporating a liquid crystal material
US20050134461A1 (en) * 2003-09-03 2005-06-23 Alexander Gelbman Electronically updateable label and display
US6956538B2 (en) * 1999-08-09 2005-10-18 Micron Technology, Inc. RFID material tracking method and apparatus
US6973710B2 (en) * 2001-08-03 2005-12-13 Seiko Epson Corporation Method and apparatus for making devices
US6975221B2 (en) * 2003-01-02 2005-12-13 Monck Joan M Luggage identifier for air and rail travelers
US7086588B2 (en) * 2003-11-28 2006-08-08 Seiko Epson Corporation Data communication systems, identification tags and methods of notifying an elapsed time period
US7233250B2 (en) * 2004-12-29 2007-06-19 Avery Dennison Corporation Radio frequency identification device with visual indicator

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2180677A (en) 1985-08-12 1987-04-01 Kevan Henry Smith Card and card system
US7071824B2 (en) 1999-07-29 2006-07-04 Micron Technology, Inc. Radio frequency identification devices, remote communication devices, identification systems, communication methods, and identification methods
FR2825480B1 (en) 2001-05-31 2003-12-19 Nemoptic POLYIMIDES FOR ANCHORING LIQUID CRYSTALS, DISPLAY DEVICES INCLUDING SAME, AND PROCESS FOR PREPARING SAME
US20020180588A1 (en) * 2001-06-05 2002-12-05 Erickson David P. Radio frequency identification in document management
JP4705107B2 (en) 2004-09-28 2011-06-22 ビジブル アセッツ,インク. RF tag for tracking and locating travel bags
TWI263932B (en) 2004-10-13 2006-10-11 Chung Hsin Electric & Machiner Wireless display device
US7145459B2 (en) 2005-01-07 2006-12-05 Taiwan Semiconductor Manufacturing Co,M Ltd. Systems and methods for manufacturing control using radio frequency identification
KR20060088481A (en) 2005-02-01 2006-08-04 이종훈 Radio frequency identification tag, system for managing items using radio frequency identification tag and method thereof
US7327261B2 (en) * 2005-07-27 2008-02-05 Zih Corp. Visual identification tag deactivation
US20080186178A1 (en) 2007-02-07 2008-08-07 Micron Technology, Inc. RFIDS, interrogators, indication systems, methods of determining a bi-directional communication range of an interrogator, methods of activating an observable indicator, and methods of indicating bi-directional functionality of a radio connection

Patent Citations (99)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4075632A (en) * 1974-08-27 1978-02-21 The United States Of America As Represented By The United States Department Of Energy Interrogation, and detection system
US4223830A (en) * 1978-08-18 1980-09-23 Walton Charles A Identification system
US4236068A (en) * 1979-03-29 1980-11-25 Walton Charles A Personal identification and signaling system
US4476469A (en) * 1980-11-14 1984-10-09 Lander David R Means for assisting in locating an object
US4675656A (en) * 1984-03-16 1987-06-23 Narcisse Bernadine O Out-of-range personnel monitor and alarm
US4926182A (en) * 1986-05-30 1990-05-15 Sharp Kabushiki Kaisha Microwave data transmission apparatus
US5113183A (en) * 1987-06-16 1992-05-12 Casio Computer Co., Ltd. Remote code transmission system between a nameplate apparatus and a data processing apparatus
US5572653A (en) * 1989-05-16 1996-11-05 Rest Manufacturing, Inc. Remote electronic information display system for retail facility
US5214410A (en) * 1989-07-10 1993-05-25 Csir Location of objects
US5119069A (en) * 1989-08-07 1992-06-02 Shmuel Hershkovitz Apparatus and method for locating boundaries of detection zones covered by a passive infrared detection system
US5087906A (en) * 1990-03-05 1992-02-11 Motorola, Inc. Selective call receiver having a light channel for providing a visual alert
US5686902A (en) * 1990-06-15 1997-11-11 Texas Instruments Incorporated Communication system for communicating with tags
US5539393A (en) * 1991-03-22 1996-07-23 Esel-Krabbe Systems A/S Information system
US5151684A (en) * 1991-04-12 1992-09-29 Johnsen Edward L Electronic inventory label and security apparatus
US5581257A (en) * 1991-09-24 1996-12-03 Gordian Holding Corporation Radio frequency automatic identification system
US5450070A (en) * 1992-03-17 1995-09-12 Massar; Sheppard Electronic missing file locator system
US5337041A (en) * 1992-04-13 1994-08-09 Lorri Friedman Personal safety guard system for stray person or pet
US5570080A (en) * 1992-04-24 1996-10-29 Toshio Inoue Theft prevention tab device having alarm mechanism housed therein
US5787174A (en) * 1992-06-17 1998-07-28 Micron Technology, Inc. Remote identification of integrated circuit
US5841770A (en) * 1992-12-15 1998-11-24 Micron Technology, Inc. Data communication system using indentification protocol
US5656998A (en) * 1993-08-31 1997-08-12 Kubota Corporation Detector for theft prevention
US5416486A (en) * 1993-11-08 1995-05-16 Apti, Inc. Identification/security tag system employing electronic doppler shifting and/or rectenna structure
US5689123A (en) * 1994-04-07 1997-11-18 Sdl, Inc. III-V aresenide-nitride semiconductor materials and devices
US5621412A (en) * 1994-04-26 1997-04-15 Texas Instruments Incorporated Multi-stage transponder wake-up, method and structure
US5617060A (en) * 1994-04-28 1997-04-01 Qualcomm Incorporated Method and apparatus for automatic gain control and DC offset cancellation in quadrature receiver
US5652569A (en) * 1994-09-02 1997-07-29 Paul Joseph Gerstenberger Child alarm
US5550547A (en) * 1994-09-12 1996-08-27 International Business Machines Corporation Multiple item radio frequency tag identification protocol
US5565858A (en) * 1994-09-14 1996-10-15 Northrop Grumman Corporation Electronic inventory system for stacked containers
US5929778A (en) * 1994-11-10 1999-07-27 Rikagaku Kenkyusho Data carrier system
US5949328A (en) * 1995-03-03 1999-09-07 Latty; James A. Apparatus and method for locatable encoding alarms
US6333690B1 (en) * 1995-03-29 2001-12-25 Medical Tracking Systems Wide area multipurpose tracking system
US5796351A (en) * 1995-04-04 1998-08-18 Fujitsu Limited System for providing information about exhibition objects
US5649296A (en) * 1995-06-19 1997-07-15 Lucent Technologies Inc. Full duplex modulated backscatter system
US5649295A (en) * 1995-06-19 1997-07-15 Lucent Technologies Inc. Dual mode modulated backscatter system
US5606323A (en) * 1995-08-31 1997-02-25 International Business Machines Corporation Diode modulator for radio frequency transponder
US5742238A (en) * 1995-09-01 1998-04-21 Emtrak, Inc. System for communication between a central controller and items in a factory using infrared light
US6327017B2 (en) * 1995-11-08 2001-12-04 Nemoptic S.A. Bistable liquid crystal display device in which nematic liquid crystal has monostable anchorings
US5940006A (en) * 1995-12-12 1999-08-17 Lucent Technologies Inc. Enhanced uplink modulated backscatter system
US6486794B1 (en) * 1996-02-26 2002-11-26 Motorola, Inc. Method of locating a subscriber unit within the coverage area of a communication system
US5689238A (en) * 1996-03-08 1997-11-18 Lucent Technologies, Inc. Object locator system and methods therefor
US5850187A (en) * 1996-03-27 1998-12-15 Amtech Corporation Integrated electronic tag reader and wireless communication link
US5850181A (en) * 1996-04-03 1998-12-15 International Business Machines Corporation Method of transporting radio frequency power to energize radio frequency identification transponders
US6130602A (en) * 1996-05-13 2000-10-10 Micron Technology, Inc. Radio frequency data communications device
US6027027A (en) * 1996-05-31 2000-02-22 Lucent Technologies Inc. Luggage tag assembly
US5673023A (en) * 1996-06-03 1997-09-30 Smith; Bradley K. Locating system with both visual and voice simulated indication capabilities
US5689240A (en) * 1996-06-05 1997-11-18 C.O.P. Corp. Child monitor system
US5887176A (en) * 1996-06-28 1999-03-23 Randtec, Inc. Method and system for remote monitoring and tracking of inventory
US5874902A (en) * 1996-07-29 1999-02-23 International Business Machines Corporation Radio frequency identification transponder with electronic circuit enabling/disabling capability
US5995019A (en) * 1996-09-30 1999-11-30 Intermec I.P. Corp Method for communicating with RF transponders
US5777561A (en) * 1996-09-30 1998-07-07 International Business Machines Corporation Method of grouping RF transponders
US6150921A (en) * 1996-10-17 2000-11-21 Pinpoint Corporation Article tracking system
US6289209B1 (en) * 1996-12-18 2001-09-11 Micron Technology, Inc. Wireless communication system, radio frequency communications system, wireless communications method, radio frequency communications method
US6023610A (en) * 1996-12-18 2000-02-08 Micron Technology, Inc. Communication system including diversity antenna queuing
US6255951B1 (en) * 1996-12-20 2001-07-03 Carlos De La Huerga Electronic identification bracelet
US6130623A (en) * 1996-12-31 2000-10-10 Lucent Technologies Inc. Encryption for modulated backscatter systems
US5952922A (en) * 1996-12-31 1999-09-14 Lucent Technologies Inc. In-building modulated backscatter system
US5912632A (en) * 1997-01-08 1999-06-15 International Business Machines Corporation Single chip RF tag oscillator circuit synchronized by base station modulation frequency
US5988510A (en) * 1997-02-13 1999-11-23 Micron Communications, Inc. Tamper resistant smart card and method of protecting data in a smart card
US5771002A (en) * 1997-03-21 1998-06-23 The Board Of Trustees Of The Leland Stanford Junior University Tracking system using radio frequency signals
US5905429A (en) * 1997-04-25 1999-05-18 City Of Lights, Inc. Audio label
US6452573B1 (en) * 1997-05-07 2002-09-17 Nemoptic, S.A. Liquid crystal device comprising anchoring means on at least one confinement plate providing a degenerated orientation
US5963177A (en) * 1997-05-16 1999-10-05 Micron Communications, Inc. Methods of enhancing electronmagnetic radiation properties of encapsulated circuit, and related devices
US5966082A (en) * 1997-05-23 1999-10-12 Intemec Ip Corp. Method of flagging partial write in RF tags
US5861817A (en) * 1997-07-02 1999-01-19 Douglas A. Palmer System for, and method of, displaying prices on tags in supermarkets
US5963133A (en) * 1997-07-18 1999-10-05 Monjo; Nicolas Electronic tag
US6024285A (en) * 1997-08-19 2000-02-15 Micron Technology, Inc. Wireless communication devices and methods of forming wireless communication devices
US6052062A (en) * 1997-08-20 2000-04-18 Micron Technology, Inc. Cards, communication devices, and methods of forming and encoding visibly perceptible information on the same
US5939981A (en) * 1998-01-28 1999-08-17 Renney; Marjorie Item locator with attachable receiver/transmitter
US6133836A (en) * 1998-02-27 2000-10-17 Micron Technology, Inc. Wireless communication and identification packages, communication systems, methods of communicating, and methods of forming a communication device
US6147602A (en) * 1998-03-11 2000-11-14 Bender; Sheldon Luggage locator system
US6133830A (en) * 1998-06-19 2000-10-17 Lexent Technologies, Inc. Motion sensitive anti-theft device with alarm screening
US6031459A (en) * 1998-07-22 2000-02-29 Micron Technology, Inc. Wireless communication devices, radio frequency identification devices, and methods of forming wireless communication devices and radio frequency identification devices
US6480699B1 (en) * 1998-08-28 2002-11-12 Woodtoga Holdings Company Stand-alone device for transmitting a wireless signal containing data from a memory or a sensor
US6008727A (en) * 1998-09-10 1999-12-28 Xerox Corporation Selectively enabled electronic tags
US6275142B1 (en) * 1998-09-15 2001-08-14 International Business Machines Corporation Interactive enhancement for printed books
US6084512A (en) * 1998-10-02 2000-07-04 Lucent Technologies, Inc. Method and apparatus for electronic labeling and localizing
US6133832A (en) * 1998-10-22 2000-10-17 Winder; Jeffrey S. Article location system
US6078260A (en) * 1998-12-21 2000-06-20 Sony Corporation Method and apparatus for keeping track of children
US6198392B1 (en) * 1999-02-10 2001-03-06 Micron Technology, Inc. Communications system and method with A/D converter
US6137422A (en) * 1999-05-21 2000-10-24 Micron Technology, Inc. Communications system and method with D/A converter
US6184789B1 (en) * 1999-06-22 2001-02-06 Xerox Corporation Method and apparatus for visually determining object location
US6466130B2 (en) * 1999-07-29 2002-10-15 Micron Technology, Inc. Wireless communication devices, wireless communication systems, communication methods, methods of forming radio frequency identification devices, methods of testing wireless communication operations, radio frequency identification devices, and methods of forming radio frequency identification devices
US6459376B2 (en) * 1999-07-29 2002-10-01 Micron Technology, Inc. Radio frequency identification devices, remote communication devices, wireless communication systems, and methods of indicating operation
US6326889B1 (en) * 1999-07-29 2001-12-04 Micron Technology, Inc. Radio frequency identification device and methods of determining a communication range of an interrogator of a wireless identification system
US6452496B1 (en) * 1999-07-29 2002-09-17 Micron Technology, Inc. Radio frequency identification devices and a method of determining a communication range
US6545605B2 (en) * 1999-07-29 2003-04-08 Micron Technology, Inc. Methods of determining a communications range of an interrogator of a wireless identification system and methods of verifying operation of a wireless identification system
US6956538B2 (en) * 1999-08-09 2005-10-18 Micron Technology, Inc. RFID material tracking method and apparatus
US6566997B1 (en) * 1999-12-03 2003-05-20 Hid Corporation Interference control method for RFID systems
US6354493B1 (en) * 1999-12-23 2002-03-12 Sensormatic Electronics Corporation System and method for finding a specific RFID tagged article located in a plurality of RFID tagged articles
US6297737B1 (en) * 2000-04-03 2001-10-02 Ericsson Inc Object locating system
US6831716B2 (en) * 2000-05-12 2004-12-14 Nemoptic Reflective bistable display device incorporating a liquid crystal material
US6795146B2 (en) * 2000-05-12 2004-09-21 Nemoptic Bistable device for reflection display with inverse contrast
US6304183B1 (en) * 2000-12-15 2001-10-16 Charles O. Causey Suitcase locating device
US6973710B2 (en) * 2001-08-03 2005-12-13 Seiko Epson Corporation Method and apparatus for making devices
US6621417B2 (en) * 2001-08-09 2003-09-16 Edgar Alan Duncan Passive RFID transponder/reader system and method for hidden obstacle detection and avoidance
US6975221B2 (en) * 2003-01-02 2005-12-13 Monck Joan M Luggage identifier for air and rail travelers
US20050134461A1 (en) * 2003-09-03 2005-06-23 Alexander Gelbman Electronically updateable label and display
US7086588B2 (en) * 2003-11-28 2006-08-08 Seiko Epson Corporation Data communication systems, identification tags and methods of notifying an elapsed time period
US7233250B2 (en) * 2004-12-29 2007-06-19 Avery Dennison Corporation Radio frequency identification device with visual indicator

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8485430B2 (en) 2011-12-06 2013-07-16 Honeywell International, Inc. Hand held bar code readers or mobile computers with cloud computing services
US9529902B2 (en) 2011-12-06 2016-12-27 Honeywell International Hand held bar code readers or mobile computers with cloud computing services
US8820630B2 (en) 2011-12-06 2014-09-02 Honeywell International, Inc. Hand held bar code readers or mobile computers with cloud computing services
US9223860B2 (en) 2011-12-06 2015-12-29 Hand Held Products, Inc. Hand held bar code readers or mobile computers with cloud computing services
US9652736B2 (en) 2012-01-26 2017-05-16 Hand Held Products, Inc. Portable RFID reading terminal with visual indication of scan trace
US9454685B2 (en) 2012-01-26 2016-09-27 Hand Held Products, Inc. Portable RFID reading terminal with visual indication of scan trace
US9256853B2 (en) 2012-01-26 2016-02-09 Hand Held Products, Inc. Portable RFID reading terminal with visual indication of scan trace
US9041518B2 (en) 2012-01-26 2015-05-26 Hand Held Products, Inc. Portable RFID reading terminal with visual indication of scan trace
US8881982B2 (en) 2012-04-20 2014-11-11 Honeywell Scanning & Mobility Portable encoded information reading terminal configured to acquire images
US8727225B2 (en) 2012-04-20 2014-05-20 Honeywell International Inc. System and method for calibration and mapping of real-time location data
US9165279B2 (en) 2012-04-20 2015-10-20 Hand Held Products, Inc. System and method for calibration and mapping of real-time location data
US9013275B2 (en) 2012-04-20 2015-04-21 Hand Held Products, Inc. Portable encoded information reading terminal configured to adjust transmit power level
US9652734B2 (en) 2012-04-20 2017-05-16 Hand Held Products, Inc. Portable encoded information reading terminal configured to acquire images
US10387692B2 (en) 2012-04-20 2019-08-20 Hand Held Products, Inc. Portable encoded information reading terminal configured to locate groups of RFID tags
US9443119B2 (en) 2012-04-20 2016-09-13 Hand Held Products, Inc. Portable encoded information reading terminal configured to locate groups of RFID tags
US10037510B2 (en) 2012-04-20 2018-07-31 Hand Held Products, Inc. System and method for calibration and mapping of real-time location data
US9471813B2 (en) 2012-04-20 2016-10-18 Hand Held Products, Inc. Portable encoded information reading terminal configured to adjust transmit power level
US10127414B2 (en) 2012-04-20 2018-11-13 Hand Held Products, Inc. Portable encoded information reading terminal configured to adjust transmit power level
US9536219B2 (en) 2012-04-20 2017-01-03 Hand Held Products, Inc. System and method for calibration and mapping of real-time location data
US9558386B2 (en) 2012-05-15 2017-01-31 Honeywell International, Inc. Encoded information reading terminal configured to pre-process images
US11301661B2 (en) 2012-05-15 2022-04-12 Honeywell International Inc. Encoded information reading terminal configured to pre-process images
US10885291B2 (en) 2012-05-15 2021-01-05 Honeywell International Inc. Encoded information reading terminal configured to pre-process images
US11727231B2 (en) 2012-05-15 2023-08-15 Honeywell International Inc. Encoded information reading terminal configured to pre-process images
US9064254B2 (en) 2012-05-17 2015-06-23 Honeywell International Inc. Cloud-based system for reading of decodable indicia
US9665655B2 (en) 2012-05-17 2017-05-30 Honeywell International, Inc. Cloud-based system for reading of decodable indicia
US9398008B2 (en) 2012-05-17 2016-07-19 Honeywell International Inc. Cloud-based system for reading of decodable indicia
US9755703B2 (en) 2012-07-10 2017-09-05 Honeywell International, Inc. Cloud-based system for processing of decodable indicia
US9092683B2 (en) 2012-07-10 2015-07-28 Honeywell International Inc. Cloud-based system for processing of decodable indicia
US20140085084A1 (en) * 2012-09-27 2014-03-27 Loran Technologies, Inc Passive active battery saver tracking system
US10025968B2 (en) 2013-09-09 2018-07-17 Hand Held Products, Inc. Initial point establishment using an image of a portion of an object
US9594939B2 (en) 2013-09-09 2017-03-14 Hand Held Products, Inc. Initial point establishment using an image of a portion of an object
CN103761846A (en) * 2013-12-05 2014-04-30 镇江高科科技信息咨询有限公司 Bundled wireless collector
US9619683B2 (en) 2014-12-31 2017-04-11 Hand Held Products, Inc. Portable RFID reading terminal with visual indication of scan trace
US10392096B2 (en) * 2015-05-12 2019-08-27 Airbus Operations S.A.S. Access device provided with a folding door enabling secure communication between at least two zones of an enclosure

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