|Número de publicación||US3846945 A|
|Tipo de publicación||Concesión|
|Fecha de publicación||12 Nov 1974|
|Fecha de presentación||2 Oct 1972|
|Fecha de prioridad||2 Oct 1972|
|También publicado como||CA975920A, CA975920A1|
|Número de publicación||US 3846945 A, US 3846945A, US-A-3846945, US3846945 A, US3846945A|
|Cesionario original||Rubbermaid Commercial Products|
|Exportar cita||BiBTeX, EndNote, RefMan|
|Citas de patentes (17), Citada por (60), Clasificaciones (8)|
|Enlaces externos: USPTO, Cesión de USPTO, Espacenet|
United States Patent 1191 HI 11111 DB llllll DU llllll llllll 111111 I] Hill] 1111]] I] llllll HI] Jlllll DU Roby 1451 Nov. 12, 1974  DUCKBOARD FATIGUE RELIEF MAT 2,826,970 3/1958 Areulich; 404 36 1 1 Inventor Michael Winchester, v4 3:152:33? 131323 3211????11::133:311:13:iiiiijiiiiiiiii: 33533 73 Assigneez Rubbermaid Commercial products 3,438,3l2 4/1969 Becker 52/177 Inc Wooster Ohio 3,676,971 7/1972 DOlllbl'OSkl 404/43  Filed: Oct 2 1972 FOREIGN PATENTS OR APPLICATIONS 90,840 7 1961 Denmark 52 591 Mi l 294,212 3,915 5 1915 Great Britain 404 41 1,475,892 4 1967 France 404 41 .S.Cl 8 U Przrnary Examlr ier Frank Abbott 51 1111.01. E046 1/10 EWWFBWY R  Field 61 Search 104/34-36, Almmey, &
104/4143; 52/581, 588, 590, 591, 177, 180; Kennel 248/206 R; 15/239, 240, 215  ABSTRACT  References Cited A duckboard mat designed to give fatigue relief when UNITED STATES PATENTS sup ortecl on an existing floor has floor engaging ribs 2,279,944- 4 1942 Hendry 15/239 undersea and l 308,805 12 1884 ROSE 15 239 opemngs therem- A p of tongues q i 1,288,409 12 1918 Hayden 15 239 erally fr one s1de of the mat have projections 2,999,431 9/1961 Mitchell 52/590 thereon and a plurality of staggered tongues extendmg 2,876,628 3/1959 Dixon 404/36 laterally from the other side have recesses therein, 2,785,001 3/1957 Ou y 248/206 R whereby interlocking connections may be made with 3,451,169 6 1969 Arnold 52/716 like mats 1 776,419 10/1903 P1611 404/43 2,680,698 1/1954 56111166 52/591 3 Claims, 18 Drawing Figures 3 4 r r '5 j 1 I5I1II =5I 111111 11111 111111111111 111111 14 111111 111111 111 111 111111 2 111111 2, 5 5555 5mm: 55 5 llllll UU llllll HI] llllll Ill] 111111 111] 111111 [ll] llllll fill llllll [1U llllll [1U llllll U llllllUl] 111111  111111 Ill] 1H1] 5555555555555555555555555 llllll El] llllll 111111101111111111111111gg111111qg111111 Q] llllll Ill] 111111  11111111] 111111 I1] llllll 555555555555555555555555 llllll Uljllllll [ll] 111111 11!] 111111 U1] 111111 1111111111 DU llllll DE] 11111] DB llllll [ll] llllll [ll] llllll [ll] llllll UI] GEGEEEEIZIEIIIEEEIEIIIEEEEEJE EIIEEIEEEEIIIEEIIEEEEEJEECIE5IIE 5 111111 1111111 111111111111 .1 111111 1111111111111111111111 1111 111111 11111 1111111111 11 1 ?5 7fl EE fi 5 IJ%' It%d-%1FI1 53 1111111111111111111111111111111111111111111111111 4 .5 5 5 5 555 555 15 Certain plastic floor mats have been proposed having slotted constructions but these interlock in one direction only to form strips, and in some cases require interlocking clips. Moreover, the amount of fatigue relief afforded by these mats is dependent upon the inherent resiliency of the plastic materials, and the slotted construction provides a supporting surface which becomes uncomfortable during extended periods of use.
Another prior mat utilizes a first set of parallel elongated rectangular rubber strips which have a plurality of longitudinal spaced-apart apertures as well as pairs of notches on opposed strip surfaces, with the notches disposed between the apertures. A second set of similar strips exists in transverse alignment with the first strips and matingly engages the first strips with the notches of the second strips residing in the apertures of the first strips. Such a construction, however, is costly as well as unyielding or rigid, and thus is also uncomfortable during extended periods of use.
SUMMARY OF THE INVENTION It is, therefore, an object of the present invention to provde a duckboard fatigue relief mat which has openings in the wear surface.
It is another object of the present invention to provide a duckboard mat, as above, in which tongue portions interlock with the tongue portions of other duckboard modules.
It is a further object of the present invention to provide a duckboard mat, as above, which is skid resistant.
It is yet another object of the present invention to provide a duckboard mat, as above, which is resilient and shock absorbent.
It is yet a further object of the present invention to provide a duckboard mat, as above, which has reinforced webbing.
It is still another object of the present invention to provide a duckboard mat, as above, which is designed to permit good circulation of air to abate mold, mildew and odors.
These and other objects of the present invention, together with the advantages thereof over existing and prior art forms, are accomplished by the improvements hereinafter described and claimed.
In general, the improved duckboard mat is made of a resilient material and has a plurality of tongues extending therefrom. The tongues have projecting members and receiving members which engage receiving and projecting members on adjoining like modules, thereby interlocking the modules to each other.
DESCRIPTION OF THE DRAWINGS FIG. 1 is a top plan view of a duckboard mat interlocked with other mats.
FIG. 2 is a bottom plan view of a single duckboard mat showing reinforcing webbing and skid resistant strips.
FIG. 3 is a side elevation taken on line 3-3 of FIG. 1.
FIG. 4 is an end elevation taken on line 4-4 of FIG. 1.
FIG. 5 is a sectional view taken on line 5-5 of FIG. 1 showing the end connection between two adjoining duckboard mats.
FIG. 6 is a sectional view taken on line 66 of FIG.
1 showing the tongue connection members between two side-adjoining mats.
FIG. 7 is a sectional view taken on line 77 of FIG. 5 showing the shape of an end projection interlocked in an aperture.
FIG. 8 is a sectional view taken on line 8-8 of FIG. 2 showing a skid resistant strip attached to a major reinforcing web.
FIG. 9 is a sectional view taken on line 9-9 of FIG. 8 showing the engagement between the strip and the web.
FIG. 10 is a sectional view taken on line 10-10 of FIG. 8 similar to FIG. 9 but showing a recess in the major web.
FIG. 11 is a perspective view of the skid resistant strip.
FIG. 12 is a top plan view of a duckboard border.
FIG. 13 is a side elevation of a duckboard border taken on line 13-13 of FIG. 12.
FIG. 14 is a partial top plan view of a corner portion of a duckboard mat interlocked with a border.
FIG. 15 is a sectional view taken on line l515 of FIG. 14 showing one manner of interlocking the border and the duckboard.
FIG. 16 is a sectional view taken on line 16-16 of FIG. 14 showing another manner of interlocking the border and the duckboard.
FIG. 17 is a sectional view taken on line 17-17 of FIG. 2 showing a portion of the reinforcing webbing.
FIG. 18 is a sectional view taken on line 18-18 of FIG. 2 showing yet another portion of the reinforcing webbing.
DESCRIPTION OF THE PREFERRED EMBODIMENT In general, a duckboard fatigue relief mat according to the concept of the present invention is generally indicated by the numeral 10. As shown in FIG. 1, the top or wearsurface of the duckboard, generally indicated by the numeral 11, has openings 12 and grip ridges 13. Preferably, the top surface is arranged in a checkerboard pattern with alternate squares having openings 12 and ridges 13 in the longitudinal and lateral or transverse directions. The openings 12, which may comprise two rectangular apertures per square with a separating rib 14, may furthermore alternate in alignment by being longitudinally aligned in one longitudinal row 12A and by being transversely aligned in adjacent longitudinal rows 128. Similarly, the ridges may have alternating longitudinal rows of longitudinally and transversely aligned ridges, as shown in FIG. 1. Of course, other layouts as well as other patterns may be used to form any of a large number of designs so long as sufficien't ridges exist in an area to provide gripping surfaces and, generally, sufficient openings exist to permit air circulation which abates mold and mildew. The duckboard preferably is made by injection molding and preferred plastics are polyvinyl chloride and polyethylene.
Each side of duckboard contains a plurality of tongues which extend laterally outwardly. As best seen in FIG. 2, the tongues may be aligned with every other square on one side of the duckboard and, on the opposite side, aligned with alternating squares which are located between the tongues of the initial side. Such an arrangement of tongues, of course, permits a particular duckboard module to engage or mesh with adjacent modules. As seen in FIG. 4, the top walls of the tongues have inclined outer portions 16 to permit a smooth transition from top surface 11 to a floor and similarly the side portions of the duckboard between the tongues have inclined portions 16.
Adjacent modules are secured to one another by interlocking tongue connectors, generally indicated by the numeral 17. In the preferred embodiment shown, the tongue connectors comprise projecting members 18 on various tongues preferably located on one side of the module and receiving members 19 located preferably in all of the tongues on the other side. The projections 18 preferably are laterally extending studs in the tongue side walls which may be U-shaped (FIG. 7) and engage the receiving members 19 in another module which may be in the shape of keyhole apertures in the tongue side walls (FIG. 4); Such projections and apertures are arranged so that they matingly engage the apertures and projections of an adjacent side module as shown in FIG. 6.
In order to secure the ends of adjacent duckboard modules to each other, an end connector member, generally indicated by the numeral 21, is utilized. The end connector may be similar to the tongue connector in that it may comprise a U-shaped projection 22 having a flange 23 and a keyhole-shaped aperture 24, both of which are located in end wall 25 and matingly engage, respectively, a keyhole-shaped aperture and a projection located in the end wall of an adjacent module. Preferably, each duckboard module has at least two end connectors so positioned that they may matingly engage adjacent end modules and securely interlock the modules to each other.
Referring now to FIGS. 12 through 16, if a particular duckboard end wall 25 is not connected to another duckboard module, it preferably is connected to a border member, generally indicated by the numeral 31. Preferably, the border has an inclined surface 32 which merges into a top surface 33 at a height substantially equal to the duckboard surface 11 so that a smooth transition is made from a floor to a duckboard end portion. Since the duckboard tongues are inclined at their outermost sides, a border is not needed in this area. Hence, carts, dollies and other equipment can better be rolled onto and off the duckboard ends or sides. In the particular duckboard embodiment shown in FIG. 2, each end has an extending tongue on one side, whereas the tongue on the opposite side is staggered or longitudinally offset. Therefore, border member 31 may be L- shaped as shown in FIG. 12. Since duckboard end wall 25 already has a projection 22 and an aperture 24, borders 31 may conveniently be provided with a matingly engageable, similarly aligned projection 34 and keyhole aperture 35. Thus, as seen in FIG. 15, border projection 34 extends through end wall aperture 35 with projection flange 36 engaging end wall 25 to maintain a secure and rigid alignment. Similarly, as seen in FIG. 16, projection 22 engages border aperture 35 and end projection flange 23 engages border leg wall 37 to effect a snug interlock.
The entire duckboard 10 is supported by a plurality of longitudinally aligned transverse skid resistant strips, generally indicated by the numeral 41, which are preferably located in the central portion of the duckboard, FIG. 2. Strips 41 have a body portion 42 and a base portion 43. The body portion has a downwardly extending groove 44 which preferably engages a major transverse web. Downwardly directed barbs 45 extend into the groove and are compressed when the transverse web loads the strip causing the barbs to frictionally engage the duckboard web. The base portion of the strips extends laterally of body portion 42 to provide stability and has a plurality of bottom ridges 46 which provide gripping surfaces to prevent duckboard movement. Since the body portion and the base portion perform different functions, they are preferably made out of different materials. The body portion of the strip which supports the weight of the duckboard, as well as persons and articles, is generally made of semirigid plastic such as a high density polyethylene, whereas the base portion which grips various surfaces is generally made of a flexible-plastic such as a resilient low density polyethylene.
Considering now duckboard 10, it has a network of major reinforcing webs which extend downwardly from top surface 11 and engage a floor or other substrate. Generally, the major webs are located in the vicinity of the surface openings and since a large number of top surface layouts may exist, the number of possible layouts of the major webs are also large. In the embodiment shown in FIG. 2, a plurality of major longitudinal webs 51 extend between end walls 25 and a plurality of major transverse webs 61 extend the width of the duckboard. Preferably, the longitudinal webs extend or run between the longitudinally orientated apertures 12A and the transverse webs extend or run between the transversely orientated apertures 12B, and thus provide a reinforcement for separating rib 14. Additionally, as shown in FIG. 2, tongue 15, including inclined tongue portions 16 as well as inclined side portions 16' of the duckboard are provided with longitudinally reinforcing ribs 52 and also transversely reinforcing ribs 62 which extend to the same depth as the major webs.
Although the major longitudinal and transverse webs provide adequate reinforcement for most uses, they do not provide sufficient support for localized stresses or weight concentrations such as the heel of a shoe or the wheel of a cart in portions of the duckboard located between the major webs. It is, therefore, desirable to have secondary reinforcing ribs to provide adequate support through the duckboard module. As with the major webs, any of a large number of layouts may be utilized. In the present embodiment, a longitudinal secondary web 55 is located laterally of or on both sides of the longitudinally orientated apertures 12A and extends the full length of the duckboard module. Likewise, secondary transverse webs 65 are located laterally of or on both sides of the transversely orientated apertures 12B and, as shown in FIG. 2, extend between the outermost major longitudinal webs 51.
In order to permit skid resistant strips 41 to be attached to the major transverse webs, a central recess 71 exists in the medial or central major longitudinal web at its intersection with each major transverse web and at the end walls 25. Since base portion 43 of strips 41 lies beneath major transverse web 61, thereby elevating the bottom of the center portion of the duckboard module above a floor, water and other fluids are free to flow through the central vicinity of the duckboard. Side recesses 72 are provided at the intersections of major transverse webs 61 and the outermost longitudinal webs 51 to enable positioning of additional strips at the sides if desired. Side recesses 72 may generally be of any shape as long as they provide adequate passage. For example, FIG. 17 discloses a rectangular recess in the longitudinal web 51 and the recess in transverse web 61 is similarly shaped, although his not shown. In FIG. 18, the longitudinal recess is U-shaped, whereas the transverse recess (not shown) is rectangularly shaped as are the recesses shown in FIG. 17. Furthermore, a tongue recess 73 may be located at various intersections with longitudinal ribs 52 and transverse ribs 62.
A duckboard reinforced as shown in FIG. 2 has been found to support heavy localized load concentrations and yet give fatigue relief to a persons feet. Additionally, the various recesses in the major webs and the ribs along with the elevated central portion permit fluid to flow through the duckboard in any direction. Surface openings 12 permit water and other fluids to drain through the duckboard surface and allow air to circulate beneath the duckboard through the recesses, thereby preventing mold and mildew buildup. Because of the inclined tongues and inclined borders, no abrupt changes exist from a floor to duckboard surface 11. Since the modules interlock at the tongue portions as well as at the end portions, a multitude of various floor layouts can be prepared.
It should thus be evident that a duckboard fatigue relief mat constructed according to the concepts of the present invention has been shown and described in sufficient detail to enable one skilled in the art to practice the invention. Since various modifications in the construction, interlocking and reinforcement of the duckboard are within the spirit of the invention herein disclosed and described, the scope of the invention is limited solely by the scope of the claims.
1. A resilient duckboard fatigue relief mat module having a network of intersecting longitudinal and lateral major floor-engaging ribs on its underside, an upper wearing surface having openings therein, and a plurality of tongues projecting laterally from opposite sides and each having downwardly inclined top walls and floor-engaging side walls, said side walls having projections and recesses for interlocking connection with projections and recesses on the side walls of like tongues of adjoining like modules, and skid resistant strips attached to certain of said major ribs.
'2. A duckboard mat as set forth in claim 1, wherein each of said skid resistant strips has a body portion and a base portion and said body portion has a longitudimajor rib.
|Patente citada||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US308805 *||2 Dic 1884||F One||Geobge mathew boss|
|US776419 *||21 Oct 1903||29 Nov 1904||Charles H Platt||Pavement.|
|US1288409 *||30 Nov 1917||17 Dic 1918||Hayden & Clemons Inc||Mat.|
|US2279944 *||22 May 1939||14 Abr 1942||Adolph R Hendry||Mat|
|US2680698 *||3 Dic 1949||8 Jun 1954||Francis Schnee Robert||Plastic floor coverings|
|US2785001 *||27 Nov 1953||12 Mar 1957||Soucy Armand J||Vehicle rainshield with suction cup attaching strip|
|US2826970 *||5 Oct 1953||18 Mar 1958||Greulich Gerald G||Sheet metal airfield deck mat|
|US2876628 *||2 Jul 1956||10 Mar 1959||Dixon Jr George F||Rapid sinking articulated revetment|
|US2999431 *||17 Oct 1957||12 Sep 1961||Robert L Mitchell||Resilient mat construction|
|US3046852 *||3 Jul 1958||31 Jul 1962||Capitol Prod Corp||Gratings|
|US3158003 *||28 Mar 1961||24 Nov 1964||Dally Don A||Sectional pier|
|US3438312 *||22 Oct 1965||15 Abr 1969||Mennessier Andre H F||Ground covering capable for use in playing tennis in the open air or under cover|
|US3451169 *||20 Mar 1967||24 Jun 1969||Flex O Lators||Edge protector|
|US3676971 *||14 Nov 1969||18 Jul 1972||Dombroski Edward L||Tile structure with cruciform shaped foundation supporting tiles|
|DK90840A *||Título no disponible|
|FR1475892A *||Título no disponible|
|GB191503915A *||Título no disponible|
|Patente citante||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US3909996 *||12 Dic 1974||7 Oct 1975||Economics Lab||Modular floor mat|
|US3983668 *||10 Feb 1975||5 Oct 1976||Ken Hassman||Flooring member|
|US4029834 *||22 Dic 1975||14 Jun 1977||Construction Specialties, Inc.||Floor mat with hinged rigid elongated rails|
|US4087948 *||13 Ene 1977||9 May 1978||Ferodo Limited||Flooring elements|
|US4167599 *||16 Ago 1977||11 Sep 1979||Esko Nissinen||Mat and units thereof|
|US4226064 *||18 Ene 1978||7 Oct 1980||Hans Kraayenhof||Flooring comprising adjoining plastics elements|
|US4361614 *||20 May 1981||30 Nov 1982||Moffitt Jr Merritt L||Slip resistant mat with molding and method of assembly|
|US4381324 *||9 Mar 1982||26 Abr 1983||Reese Enterprises, Inc.||Coupling member for floor covering sections|
|US4468910 *||23 Mar 1983||4 Sep 1984||Morrison Richard A||Mat module with ramp strip|
|US4478901 *||29 Nov 1982||23 Oct 1984||Teknor Apex Company||Floor mat construction|
|US4677799 *||3 Dic 1985||7 Jul 1987||Minnesota Mining And Manufacturing Company||Multi-sectional raceway|
|US4727697 *||23 Abr 1986||1 Mar 1988||Vaux Thomas M||Impact absorbing safety matting system|
|US4846457 *||5 Feb 1988||11 Jul 1989||Safety Surfaces, Inc.||Impact-absorbing safety matting system for a sports game surface|
|US4948116 *||10 Jul 1989||14 Ago 1990||Vaux Thomas M||Impact-absorbing safety matting system for a children's play mat|
|US4991834 *||10 Jul 1989||12 Feb 1991||Vaux Thomas M||Shock-attenuating seamless surface system for use under and around playground equipment|
|US4998717 *||10 Jul 1989||12 Mar 1991||Vaux Thomas M||Impact-absorbing safety matting system for a helipad|
|US5013029 *||10 Jul 1989||7 May 1991||Vaux Thomas M||Shock-attenuating seamless surface system for use on vertical takeoff and landing zones|
|US6101776 *||25 Ene 1999||15 Ago 2000||Cerad Industries, Inc.||Sub-floor panel system|
|US6127015 *||11 Ago 1999||3 Oct 2000||R & L Marketing & Sales, Inc.||Floor mat system|
|US6440525||19 Nov 2001||27 Ago 2002||R & L Marketing And Sales, Inc.||Floor mat system with adjustable clip|
|US6444284||30 Ene 2002||3 Sep 2002||R & L Marketing And Sales Inc.||Floor mat system for supporting heavy loads|
|US6505444 *||10 Nov 2000||14 Ene 2003||Enterprises International, Inc.||Free standing modular floor mat system|
|US6531203||29 Ene 2002||11 Mar 2003||R&L Marketing And Sales, Inc.||Floor mat system for supporting heavy loads|
|US6578324 *||3 May 2001||17 Jun 2003||R & J Marketing And Sales, Inc.||Spillage control safety floor matting|
|US6635331||3 Jul 2001||21 Oct 2003||Ronald N. Kessler||Universal mat with removable strips|
|US6663937||21 Nov 2001||16 Dic 2003||Myron Ullman||Universal mat with removable strips|
|US6737150||28 Sep 2001||18 May 2004||Everwear Professional Products, Inc.||Folding floor mat|
|US6740380||5 Mar 2002||25 May 2004||R&L Marketing & Sales, Inc.||Floor mat system|
|US7043792||19 Abr 2002||16 May 2006||R&L Marketing & Sales, Inc.||Floor mat system with flanged cover|
|US7175899||14 Oct 2005||13 Feb 2007||R&L Marketing & Sales, Inc.||Universal mat with removable strips|
|US7192631||9 Oct 2001||20 Mar 2007||Ergotech Solutions, Inc.||Ergonomic surgical floormat|
|US7303801||10 Nov 2006||4 Dic 2007||R & L Marketing & Sales, Inc.||Universal mat with removable strips|
|US7445833||13 Abr 2006||4 Nov 2008||Ergotech Solutions, Inc.||Ergonomic floor mat|
|US7540684 *||21 Nov 2007||2 Jun 2009||Champagne Edition Inc.||Interlocking rubber mat resembling a paving stone surface|
|US8132385 *||13 Ene 2005||13 Mar 2012||Southwest Agri-Plastic, Inc.||Benchtop panels|
|US8640403 *||28 Nov 2012||4 Feb 2014||Macneil Ip Llc||Floor tile with elastomer jacketed bottom support members|
|US8973328 *||12 Jul 2013||10 Mar 2015||Macneil Ip Llc||Floor tile expansion joint|
|US8997419||27 Ene 2015||7 Abr 2015||Macneil Ip Llc||Modular floor tile system with expansion joint|
|US9181697||4 Dic 2012||10 Nov 2015||Macneil Ip Llc||Floor tile having a latch and loop structure|
|US9228299 *||1 Ago 2014||5 Ene 2016||Brian Brown||Pervious paving mat with raised teeth|
|US20030062372 *||2 Oct 2002||3 Abr 2003||Metso Minerals (Trelleborg) Ab||Wear-resistant lining element and wear lining made thereof|
|US20030196288 *||19 Abr 2002||23 Oct 2003||Kessler Ronald N.||Floor mat system with flanged cover|
|US20050170139 *||5 Abr 2005||4 Ago 2005||R&L Marketing & Sales, Inc.||Universal mat with removable strips|
|US20060035059 *||14 Oct 2005||16 Feb 2006||R&L Marketing & Sales, Inc.||Universal mat with removable strips|
|US20060162272 *||13 Ene 2005||27 Jul 2006||Southwest Agri-Plastics, Inc.||Benchtop panels|
|US20060172122 *||13 Abr 2006||3 Ago 2006||Polley John W||Ergonomic Floor Mat|
|US20070054083 *||10 Nov 2006||8 Mar 2007||R&L Marketing & Sales, Inc||Universal mat with removable strips|
|US20070163195 *||21 Dic 2006||19 Jul 2007||Connor Sport Court International, Inc.||Integrated edge and corner ramp for a floor tile|
|US20080199650 *||21 Feb 2007||21 Ago 2008||Taicang All Mats Plastic Industry Co., Ltd.||Multifunctional and modular combined doormat|
|US20090129861 *||21 Nov 2007||21 May 2009||Champagne Edition Inc.||Interlocking rubber mat resembling a paving stone surface|
|US20130071625 *||28 Nov 2012||21 Mar 2013||Macneil Ip Llc||Floor tile with elastomer jacketed bottom support members|
|US20140130725 *||30 Dic 2011||15 May 2014||Nanjing University Of Technology||Anti-collision device made of buffering energy-absorbing type web-enhanced composite material|
|US20150013259 *||12 Jul 2013||15 Ene 2015||Macneil Ip Llc||Floor tile expansion joint|
|US20150056013 *||1 Ago 2014||26 Feb 2015||Brian Brown||Pervious Paving Mat with Raised Teeth|
|USRE32061 *||11 Jun 1984||7 Ene 1986||Reese Enterprises, Inc.||Coupling member for floor covering sections|
|EP0117707A2 *||21 Feb 1984||5 Sep 1984||Richard A. Morrison||Mat module with ramp strip|
|EP0117707A3 *||21 Feb 1984||11 Sep 1985||Richard A. Morrison||Mat module with ramp strip|
|WO1989009008A1 *||16 Mar 1989||5 Oct 1989||Keijo Palmroos||A mat|
|WO2002090645A2 *||3 May 2002||14 Nov 2002||R & L Marketing And Sales, Inc.||Spillage control safety floor matting|
|WO2002090645A3 *||3 May 2002||6 Feb 2003||Kim D Kendall||Spillage control safety floor matting|
|Clasificación de EE.UU.||52/177, 404/44, 52/592.1, 404/36, 52/581|