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Brevets

Référencé par

Brevet citant Date de dépôt Date de délivrance Cessionnaire d'origine Titre
US402567327 mars 197524 mai 1977Method of forming copy resistant documents by forming an orderly array of fibers extending upward from a surface, coating the fibers and printing the coated fibers and the copy resistant document resulting from said method
US41181227 févr. 19773 oct. 1978Xerox CorporationMethod of rendering objects uncopyable by photocopy processes
US41249478 nov. 197614 nov. 1978Graphic pattern or the like and method of producing the same
US41757765 janv. 197827 nov. 1979New England Mutual Life Insurance CompanyCounterfeit resistant document
US41847001 sept. 197822 janv. 1980LGZ Landis & Gyr Zug AGDocuments embossed with optical markings representing genuineness information
US42277208 nov. 197814 oct. 1980Burroughs CorporationProtected document
US426546918 mai 19775 mai 1981Burroughs CorporationProtected document and method of making same
US428192117 sept. 19794 août 1981Plural color anti-copying systems for xerographic and electrostatic copying machines
US430330724 oct. 19791 déc. 1981Copy security system
US431018023 juil. 198012 janv. 1982Burroughs CorporationProtected document and method of making same
US458681114 avr. 19836 mai 1986Ricoh Company, Ltd.Confidential document reproduction prevention method
US463242916 mars 198330 déc. 1986Nocoi Inc.Method of rendering documents resistant to photocopying and anti-copying paper therefor
US470530021 nov. 198610 nov. 1987Optical Coating Laboratory, Inc.Thin film optically variable article and method having gold to green color shift for currency authentication
US477989821 août 198725 oct. 1988Optical Coating Laboratory, Inc.Thin film optically variable article and method having gold to green color shift for currency authentication
US478608418 nov. 198522 nov. 1988Copyguard, Inc.Volumetric holographic photocopy prevention film
US485685726 sept. 198815 août 1989Dai Nippon Insatsu Kabushiki KaishaTransparent reflection-type
US495622318 févr. 198711 sept. 1990Canon Kabushiki KaishaRecording medium and recording method utilizing the same
US514957823 déc. 199122 sept. 1992The Dow Chemical CompanyMultilayer film for tamper indication by use of optical interference reflection
US535114216 avr. 199327 sept. 1994Crown Roll Leaf, Inc.Semi-transparent reflective layer for a phase hologram
US54755332 août 199312 déc. 1995Applied Physics Research, L.P.Apparatus for enhancing the brightness of an image and method of making the same
US548756724 avr. 199230 janv. 1996Francois-Charles Oberthur GroupPrinting method and copy-evident secure document
US551301926 oct. 199330 avr. 1996Crown Roll Leaf, Inc.Semi-transparent reflective layer for a phase hologram
US556952224 août 199429 oct. 1996BASF Magnetics GmbHAnticopying film
US568380515 mars 19964 nov. 1997Lintec CorporationColored film
US572844913 févr. 199517 mars 1998EMTEC Magnetics GmbHAnti-copy film layer for documents
US579564313 févr. 199518 août 1998BASF Magnetics GmbHAnticopying film
US58235766 mai 199420 oct. 1998Lew LambertCopy-resistant document
US594819917 sept. 19977 sept. 1999Surface relief holograms and holographic hot-stamping foils, and method of fabricating same
US59517694 juin 199714 sept. 1999Crown Roll Leaf, Inc.Method and apparatus for making high refractive index (HRI) film
US610724417 avr. 199822 août 2000Nashua CorporationVerification methods employing thermally--imageable substrates
US619403121 avr. 199927 févr. 2001Crown Roll Leaf, Inc.Method for making high refractive index (HRI) film by adjusting the flow rate of a vaporized material
US629425131 déc. 199825 sept. 2001Lintec CorporationColored film
US639692723 mars 199828 mai 2002Verify First Technologies, Inc.Variable density verification
US663198723 janv. 200114 oct. 2003Nike, Inc.Activity-specific optical filters and eyewear using such filters
US666540620 avr. 200016 déc. 2003Verify First Technologies, Inc.Variable density verification
US674605329 oct. 19988 juin 2004International Business Machines CorporationSystem for preventing parallel marketing of retail items
US681753820 mai 200216 nov. 2004International Business Machines CorporationMethod and system for preventing parallel marketing of wholesale and retail items
US725691323 déc. 200314 août 2007Hewlett-Packard Development Company, L.P.Image adjustment
US738954330 juin 200424 juin 2008Nike, Inc.Optically decentered face shield
US774413014 mai 200729 juin 2010Secure product authentication tags
US79976253 nov. 200416 août 2011De La Ru International LimitedSecurity device