|
| US4143967 | 30 May 1978 | 13 Mar 1979 | Benjamin J. Haggquist | Latent photo system |
| US4175775 | 11 Ene 1978 | 27 Nov 1979 | Visual Methods, Inc. | Access control system |
| US4222662 | 4 Abr 1979 | 16 Sep 1980 | Visual Methods, Inc. | Access control system |
| US4504084 | 30 Ene 1984 | 12 Mar 1985 | Sodeco-Saia AG | Documents containing information invisible to the naked eye |
| US4510006 | 7 Sep 1982 | 9 Abr 1985 | | Personalized laminated display |
| US4536015 | 3 Mar 1983 | 20 Ago 1985 | Agfa-Gevaert Aktiengesellschaft | Forgery-proof information carrier |
| US4544181 | 20 Feb 1980 | 1 Oct 1985 | GAO Gesellschaft fur Automation und Organisation mbH | Identification card |
| US4544184 | 7 Jul 1983 | 1 Oct 1985 | Freund Precision, Inc. | Tamper-proof identification card and identification system |
| US4583766 | 8 May 1984 | 22 Abr 1986 | Kenneth R. Wessel | Secure badge for infrared badge reader and process for making same |
| US4632430 | 8 May 1984 | 30 Dic 1986 | | Secure and self-verifiable image |
| US4634148 | 17 Nov 1983 | 6 Ene 1987 | | Negotiable instrument |
| US4684593 | 2 May 1986 | 4 Ago 1987 | Secure Images Inc. | Secure and self-verifiable image |
| US4687526 | 8 Ene 1986 | 18 Ago 1987 | Identification Systems Company L.P. | Method of making an identification card |
| US4720975 | 15 May 1986 | 26 Ene 1988 | Ramsey Winch Company | Control valve |
| US4724309 | 9 May 1986 | 9 Feb 1988 | | Machine readable document and method for processing |
| US4747620 | 13 Ago 1986 | 31 May 1988 | The De La Rue Company PLC | Security card and security card blank |
| US4796921 | 2 Feb 1987 | 10 Ene 1989 | Penny-Ohlmann-Neiman, Inc. | Hidden printing |
| US4889365 | 11 Abr 1988 | 26 Dic 1989 | The Label Printers | Counterfeit resistant label and method of making the same |
| US4927180 | 6 Jun 1988 | 22 May 1990 | Plessey Overseas Limited | Marking of articles with photochromic compounds |
| US4999065 | 8 Jun 1988 | 12 Mar 1991 | Lasercard Company L.P. | Method of making an identification card |
| US5067713 | 29 Mar 1990 | 26 Nov 1991 | Technical Systems Corp. | Coded playing cards and apparatus for dealing a set of cards |
| US5169155 | 25 Nov 1991 | 8 Dic 1992 | Technical Systems Corp. | Coded playing cards and other standardized documents |
| US5259907 | 1 Dic 1992 | 9 Nov 1993 | Technical Systems Corp. | Method of making coded playing cards having machine-readable coding |
| US5360235 | 1 Nov 1969 | 1 Nov 1994 | The United States of America as represented by the Secretary of the Navy | Secret optical marking |
| US5372387 | 15 Dic 1992 | 13 Dic 1994 | | Security device for document protection |
| US5410142 | 10 Mar 1993 | 25 Abr 1995 | Omron Corporation | Optical card with printing visible below the optical recording |
| US5514860 | 3 Oct 1994 | 7 May 1996 | Pitney Bowes Inc. | Document authentication system utilizing a transparent label |
| US5582434 | 24 Abr 1992 | 10 Dic 1996 | Flexcon Company, Inc. | Tamper-resistant labeling |
| US5588679 | 7 Jun 1995 | 31 Dic 1996 | FLEXcon Company, Inc. | Tamper resistant labeling |
| US5638103 | 5 Jun 1995 | 10 Jun 1997 | Dai Nippon Printing Co., Ltd. | Method for recording and reproducing information, apparatus therefor and recording medium |
| US5816620 | 13 Ene 1997 | 6 Oct 1998 | | Key locator |
| US5862247 | 4 Abr 1994 | 19 Ene 1999 | Borus Spezialverfahren und -gerate im Sondermaschinenbau GmbH | Personal and property identification system |
| US5983057 | 5 Jun 1995 | 9 Nov 1999 | Dai Nippon Printing Co. Ltd | Color imaging system with selectively openable optical shutter |
| US5992891 | 3 Abr 1998 | 30 Nov 1999 | Drexler Technology Corporation | Tamper resistant identification card |
| US6127050 | 15 May 1998 | 3 Oct 2000 | | Archival imaging medium and method therefor |
| US6203069 | 15 Oct 1999 | 20 Mar 2001 | DNA Technologies Inc. | Label having an invisible bar code applied thereon |
| US6493013 | 7 Mar 1997 | 10 Dic 2002 | Dainippon Printing Co., Ltd. | Method for recording and reproducing information, apparatus therefor and recording medium |
| US7044386 | 1 Feb 2003 | 16 May 2006 | | Information encoding on surfaces by varying spectral emissivity |
| US7267285 | 22 Mar 2006 | 11 Sep 2007 | | Information encoding on surfaces by varying spectral emissivity |
| US7407195 | 14 Abr 2004 | 5 Ago 2008 | | Label for receiving indicia having variable spectral emissivity values |
| US7619520 | 24 Jun 2005 | 17 Nov 2009 | | Radio frequency identification labels and systems and methods for making the same |
| US7621451 | 24 Jun 2005 | 24 Nov 2009 | | Radio frequency identification labels and systems and methods for making the same |
| US7625632 | 2 Ago 2006 | 1 Dic 2009 | JDS Uniphase Corporation | Alignable diffractive pigment flakes and method and apparatus for alignment and images formed therefrom |
| US7651031 | 25 Oct 2004 | 26 Ene 2010 | | Systems and methods for reading indicium |
| US7661600 | 19 Abr 2007 | 16 Feb 2010 | L-1 Identify Solutions | Laser etched security features for identification documents and methods of making same |
| US7674501 | 1 May 2006 | 9 Mar 2010 | JDS Uniphase Corporation | Two-step method of coating an article for security printing by application of electric or magnetic field |
| US7694887 | 23 Dic 2004 | 13 Abr 2010 | L-1 Secure Credentialing, Inc. | Optically variable personalized indicia for identification documents |
| US7727060 | 24 Mar 2006 | 1 Jun 2010 | | Land-based, on-line poker system |
| US7728726 | 24 Jun 2005 | 1 Jun 2010 | | Radio frequency identification labels |
| US7789311 | 5 Jun 2007 | 7 Sep 2010 | L-1 Secure Credentialing, Inc. | Three dimensional data storage |
| US7798413 | 20 Jun 2006 | 21 Sep 2010 | L-1 Secure Credentialing, Inc. | Covert variable information on ID documents and methods of making same |
| US7804982 | 26 Nov 2003 | 28 Sep 2010 | L-1 Secure Credentialing, Inc. | Systems and methods for managing and detecting fraud in image databases used with identification documents |
| US7815124 | 9 Abr 2003 | 19 Oct 2010 | L-1 Secure Credentialing, Inc. | Image processing techniques for printing identification cards and documents |
| US7824029 | 12 May 2003 | 2 Nov 2010 | L-1 Secure Credentialing, Inc. | Identification card printer-assembler for over the counter card issuing |
| US7931413 | 24 Jun 2005 | 26 Abr 2011 | | Printing system ribbon including print transferable circuitry and elements |
| US8025952 | 30 Oct 2007 | 27 Sep 2011 | JDS Uniphase Corporation | Printed magnetic ink overt security image |
| US8083152 | 16 Feb 2010 | 27 Dic 2011 | L-1 Secure Credentialing, Inc. | Laser etched security features for identification documents and methods of making same |
| US8118963 | 27 Jun 2007 | 21 Feb 2012 | | Stamping a coating of cured field aligned special effect flakes and image formed thereby |
| US8235298 | 21 Dic 2009 | 7 Ago 2012 | | Systems and methods for reading indicium |
