|
| US3989570 | 5 Sep 1974 | 2 Nov 1976 | Precision Dynamics Corporation | Method for producing an imprinting device |
| US4740015 | 1 Jul 1986 | 26 Apr 1988 | Moore Business Forms, Inc. | Security document and method of testing same |
| US5166980 | 28 Jun 1991 | 24 Nov 1992 | | Tabular guide decrypting apparatus |
| US5219437 | 21 Jan 1992 | 15 Jun 1993 | The Mead Corporation | Fabric covered book cover |
| US5321749 | 21 Sep 1992 | 14 Jun 1994 | | Encryption device |
| US5398283 | 3 Nov 1993 | 14 Mar 1995 | Krypto Fax Partners L.P. | Encryption device |
| US5488664 | 22 Apr 1994 | 30 Jan 1996 | Yeda Research and Development Co., Ltd. | Method and apparatus for protecting visual information with printed cryptographic watermarks |
| US6062604 | 9 Apr 1999 | 16 May 2000 | Securency Pty Ltd. | Self-verifying security documents |
| US6139066 | 26 Mar 1999 | 31 Oct 2000 | The Standard Register Company | Optically decodable security document |
| US6273473 | 7 Apr 2000 | 14 Aug 2001 | Securency Pty Ltd | Self-verifying security documents |
| US6373947 | 13 Oct 2000 | 16 Apr 2002 | Aliroo Ltd. | Document processing |
| US6467810 | 30 May 2001 | 22 Oct 2002 | Securency Pty Ltd | Self-verifying security documents |
| US6471247 | 19 Aug 1999 | 29 Oct 2002 | Securency Pty Ltd | Banknotes incorporating security devices |
| US6471248 | 12 Oct 2001 | 29 Oct 2002 | Securency Pty Ltd. | Banknotes incorporating security devices |
| US6761377 | 6 May 2003 | 13 Jul 2004 | Securency Pty Ltd | Self-verifying security documents |
| US7040664 | 1 Jul 2004 | 9 May 2006 | Securency PTY LTD | Self-verifying security documents |
| US7339740 | 16 Jul 2005 | 4 Mar 2008 | | Image decoder system |
| US7488002 | 22 Dec 2003 | 10 Feb 2009 | Securency Pty Limited | Security and/or value document |