|
| US4025673 | 27 mars 1975 | 24 mai 1977 | | Method 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 |
| US4118122 | 7 févr. 1977 | 3 oct. 1978 | Xerox Corporation | Method of rendering objects uncopyable by photocopy processes |
| US4124947 | 8 nov. 1976 | 14 nov. 1978 | | Graphic pattern or the like and method of producing the same |
| US4175776 | 5 janv. 1978 | 27 nov. 1979 | New England Mutual Life Insurance Company | Counterfeit resistant document |
| US4184700 | 1 sept. 1978 | 22 janv. 1980 | LGZ Landis & Gyr Zug AG | Documents embossed with optical markings representing genuineness information |
| US4227720 | 8 nov. 1978 | 14 oct. 1980 | Burroughs Corporation | Protected document |
| US4265469 | 18 mai 1977 | 5 mai 1981 | Burroughs Corporation | Protected document and method of making same |
| US4281921 | 17 sept. 1979 | 4 août 1981 | | Plural color anti-copying systems for xerographic and electrostatic copying machines |
| US4303307 | 24 oct. 1979 | 1 déc. 1981 | | Copy security system |
| US4310180 | 23 juil. 1980 | 12 janv. 1982 | Burroughs Corporation | Protected document and method of making same |
| US4586811 | 14 avr. 1983 | 6 mai 1986 | Ricoh Company, Ltd. | Confidential document reproduction prevention method |
| US4632429 | 16 mars 1983 | 30 déc. 1986 | Nocoi Inc. | Method of rendering documents resistant to photocopying and anti-copying paper therefor |
| US4705300 | 21 nov. 1986 | 10 nov. 1987 | Optical Coating Laboratory, Inc. | Thin film optically variable article and method having gold to green color shift for currency authentication |
| US4779898 | 21 août 1987 | 25 oct. 1988 | Optical Coating Laboratory, Inc. | Thin film optically variable article and method having gold to green color shift for currency authentication |
| US4786084 | 18 nov. 1985 | 22 nov. 1988 | Copyguard, Inc. | Volumetric holographic photocopy prevention film |
| US4856857 | 26 sept. 1988 | 15 août 1989 | Dai Nippon Insatsu Kabushiki Kaisha | Transparent reflection-type |
| US4956223 | 18 févr. 1987 | 11 sept. 1990 | Canon Kabushiki Kaisha | Recording medium and recording method utilizing the same |
| US5149578 | 23 déc. 1991 | 22 sept. 1992 | The Dow Chemical Company | Multilayer film for tamper indication by use of optical interference reflection |
| US5351142 | 16 avr. 1993 | 27 sept. 1994 | Crown Roll Leaf, Inc. | Semi-transparent reflective layer for a phase hologram |
| US5475533 | 2 août 1993 | 12 déc. 1995 | Applied Physics Research, L.P. | Apparatus for enhancing the brightness of an image and method of making the same |
| US5487567 | 24 avr. 1992 | 30 janv. 1996 | Francois-Charles Oberthur Group | Printing method and copy-evident secure document |
| US5513019 | 26 oct. 1993 | 30 avr. 1996 | Crown Roll Leaf, Inc. | Semi-transparent reflective layer for a phase hologram |
| US5569522 | 24 août 1994 | 29 oct. 1996 | BASF Magnetics GmbH | Anticopying film |
| US5683805 | 15 mars 1996 | 4 nov. 1997 | Lintec Corporation | Colored film |
| US5728449 | 13 févr. 1995 | 17 mars 1998 | EMTEC Magnetics GmbH | Anti-copy film layer for documents |
| US5795643 | 13 févr. 1995 | 18 août 1998 | BASF Magnetics GmbH | Anticopying film |
| US5823576 | 6 mai 1994 | 20 oct. 1998 | Lew Lambert | Copy-resistant document |
| US5948199 | 17 sept. 1997 | 7 sept. 1999 | | Surface relief holograms and holographic hot-stamping foils, and method of fabricating same |
| US5951769 | 4 juin 1997 | 14 sept. 1999 | Crown Roll Leaf, Inc. | Method and apparatus for making high refractive index (HRI) film |
| US6107244 | 17 avr. 1998 | 22 août 2000 | Nashua Corporation | Verification methods employing thermally--imageable substrates |
| US6194031 | 21 avr. 1999 | 27 févr. 2001 | Crown Roll Leaf, Inc. | Method for making high refractive index (HRI) film by adjusting the flow rate of a vaporized material |
| US6294251 | 31 déc. 1998 | 25 sept. 2001 | Lintec Corporation | Colored film |
| US6396927 | 23 mars 1998 | 28 mai 2002 | Verify First Technologies, Inc. | Variable density verification |
| US6631987 | 23 janv. 2001 | 14 oct. 2003 | Nike, Inc. | Activity-specific optical filters and eyewear using such filters |
| US6665406 | 20 avr. 2000 | 16 déc. 2003 | Verify First Technologies, Inc. | Variable density verification |
| US6746053 | 29 oct. 1998 | 8 juin 2004 | International Business Machines Corporation | System for preventing parallel marketing of retail items |
| US6817538 | 20 mai 2002 | 16 nov. 2004 | International Business Machines Corporation | Method and system for preventing parallel marketing of wholesale and retail items |
| US7256913 | 23 déc. 2003 | 14 août 2007 | Hewlett-Packard Development Company, L.P. | Image adjustment |
| US7389543 | 30 juin 2004 | 24 juin 2008 | Nike, Inc. | Optically decentered face shield |
| US7744130 | 14 mai 2007 | 29 juin 2010 | | Secure product authentication tags |
| US7997625 | 3 nov. 2004 | 16 août 2011 | De La Ru International Limited | Security device |