| Patents for G09C 5 - Ciphering or deciphering apparatus or methods not provided for in other groups of this subclass, e.g. involving the concealment or deformation of graphic data such as designs, written or printed messages (2,737) |
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| 05/24/1988 | US4746123 Method for scrambling and unscrambling illustrations/a puzzle drawing game |
| 05/04/1988 | EP0265497A1 Information transfer and use, particularly with respect to objects such as gambling chips |
| 03/29/1988 | US4734040 Memory enhancement device and method |
| 03/23/1988 | EP0260815A1 Secure encoding method and associated products |
| 03/22/1988 | US4732411 Medication dispensing identifier system |
| 02/24/1988 | EP0256176A1 Security documents |
| 02/02/1988 | US4723284 Authentication system |
| 01/26/1988 | CA1232080A1 Security system |
| 12/23/1987 | EP0249917A2 Thermally readable, surface-characterizing arrangement, and method and device for its temperature activation |
| 11/25/1987 | CN86103377A Secure placement of confidential information on circulated blank ticket |
| 11/19/1987 | WO1987007106A1 Portable handheld terminal including optical bar code reader and electromagnetic transceiver means for interactive wireless communication with a base communications station |
| 10/27/1987 | US4702497 Method of encoding a symbol or message on a plastic material and an article on which a symbol has been so encoded |
| 10/22/1987 | WO1987006372A1 Information transfer and use, particularly with respect to objects such as gambling chips |
| 09/09/1987 | CN86100515A Printing type of chinese character with phonetic annotation |
| 07/28/1987 | US4682954 Cryptographic process and enciphered product |
| 03/17/1987 | US4650219 Child I.D. system |
| 03/17/1987 | CA1219371A1 System for the printing and reading of encrypted messages |
| 02/03/1987 | US4641346 System for the printing and reading of encrypted messages |
| 09/16/1986 | CA1211521A1 Cryptographic system |
| 04/09/1986 | EP0176538A1 Security system |
| 02/11/1986 | CA1200385A1 Optically-readable cards |
| 10/24/1985 | WO1985004746A1 Security system |
| 03/19/1985 | US4505498 Optically-readable cards |
| 10/30/1984 | US4480179 Apparatus for coding and/or decoding a document |
| 07/31/1984 | US4463250 Method and apparatus for use against counterfeiting |
| 02/15/1984 | EP0100747A2 Optically-readable cards |
| 01/13/1982 | EP0043509A1 Method of making a hologram with reconstruction thereof in mono- or polychromatic light |
| 12/02/1980 | CA1090640A1 Photographic encoding system using lenticular graticule and synchronous motion |
| 04/15/1980 | US4198147 Encoding system |
| 02/05/1980 | CA1070996A1 Holographic method of recording and reading secret information |
| 01/29/1980 | US4185888 Cryptographic system employing optical scrambling arrays |
| 10/17/1978 | US4120559 Method of establishing secret information |
| 05/30/1978 | US4092654 Encoding system |
| 12/20/1977 | US4063799 Photographic imaging |
| 05/17/1977 | US4023902 Indicia encoding system |
| 07/20/1976 | US3969830 Color encoding-decoding method |
| 02/10/1976 | US3937565 Process of coding indicia and product produced thereby |