CA2265744A1 - Machine-readable optical disc with reading-inhibit agent - Google Patents

Machine-readable optical disc with reading-inhibit agent

Info

Publication number
CA2265744A1
CA2265744A1 CA002265744A CA2265744A CA2265744A1 CA 2265744 A1 CA2265744 A1 CA 2265744A1 CA 002265744 A CA002265744 A CA 002265744A CA 2265744 A CA2265744 A CA 2265744A CA 2265744 A1 CA2265744 A1 CA 2265744A1
Authority
CA
Canada
Prior art keywords
reading
disc
machine
barrier layer
optical disc
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002265744A
Other languages
French (fr)
Other versions
CA2265744C (en
Inventor
Philip E. Rollhaus
John R. Powell
Eric J. Carlson
Daniel J. Ehntholt
Irwin C. Winkler
Christopher J. Marmo
James R. Valentine
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Flexplay Technologies Inc
Original Assignee
Quixote Corporation
Philip E. Rollhaus
John R. Powell
Eric J. Carlson
Daniel J. Ehntholt
Irwin C. Winkler
Christopher J. Marmo
James R. Valentine
Spectradisc Corporation
Flexplay Technologies, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26701179&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2265744(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Quixote Corporation, Philip E. Rollhaus, John R. Powell, Eric J. Carlson, Daniel J. Ehntholt, Irwin C. Winkler, Christopher J. Marmo, James R. Valentine, Spectradisc Corporation, Flexplay Technologies, Inc. filed Critical Quixote Corporation
Publication of CA2265744A1 publication Critical patent/CA2265744A1/en
Application granted granted Critical
Publication of CA2265744C publication Critical patent/CA2265744C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/68—Record carriers
    • G11B3/70—Record carriers characterised by the selection of material or structure; Processes or apparatus specially adapted for manufacturing record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00572—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium
    • G11B20/00586—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium said format change concerning the physical format of the recording medium
    • G11B20/00608—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium said format change concerning the physical format of the recording medium wherein the material that the record carrier is made of is altered, e.g. adding reactive dyes that alter the optical properties of a disc after prolonged exposure to light or air
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material

Abstract

An optical disc (20) having machine-readable, information-encoding features (22) is provided with a barrier layer secured to the disc. This barrier layer (24) is configured to prevent machine-reading of the features. A reading-inhibit agent (14, 34), included in the disc and activated by removal of the barrier layer, is operative, once activated, to alter the disc to inhibit reading of the disc after some period of time. Alternately, the barrier layer can be eliminated and the reading-inhibit agent can be activated by initial reading of the disc, as for example by exposure to optical radiation associated with reading of the disc, or rotation of the disc.
CA002265744A 1996-09-16 1997-09-15 Machine-readable optical disc with reading-inhibit agent Expired - Fee Related CA2265744C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US2639096P 1996-09-16 1996-09-16
US60/026,390 1996-09-16
US08/902,844 1997-07-30
US08/902,844 US6011772A (en) 1996-09-16 1997-07-30 Machine-readable optical disc with reading-inhibit agent
PCT/US1997/016277 WO1998011539A1 (en) 1996-09-16 1997-09-15 Machine-readable optical disc with reading-inhibit agent

Publications (2)

Publication Number Publication Date
CA2265744A1 true CA2265744A1 (en) 1998-03-19
CA2265744C CA2265744C (en) 2001-03-06

Family

ID=26701179

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002265744A Expired - Fee Related CA2265744C (en) 1996-09-16 1997-09-15 Machine-readable optical disc with reading-inhibit agent

Country Status (11)

Country Link
US (4) US6011772A (en)
EP (1) EP0925581B1 (en)
JP (1) JP4229983B2 (en)
KR (1) KR100630036B1 (en)
CN (1) CN1210691C (en)
AT (1) ATE320654T1 (en)
AU (1) AU4347697A (en)
CA (1) CA2265744C (en)
DE (1) DE69735493T2 (en)
ES (1) ES2260799T3 (en)
WO (1) WO1998011539A1 (en)

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USRE42011E1 (en) 2010-12-28
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US6434109B2 (en) 2002-08-13
AU4347697A (en) 1998-04-02
US6343063B1 (en) 2002-01-29
ES2260799T3 (en) 2006-11-01
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JP4229983B2 (en) 2009-02-25
WO1998011539A1 (en) 1998-03-19
US20010046204A1 (en) 2001-11-29
CN1210691C (en) 2005-07-13
US6011772A (en) 2000-01-04
KR100630036B1 (en) 2006-09-27
DE69735493D1 (en) 2006-05-11
ATE320654T1 (en) 2006-04-15
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EP0925581A1 (en) 1999-06-30
EP0925581B1 (en) 2006-03-15

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