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| Number | Title | Issue Date |
| 7436957 | Audio cassette emulator with cryptographic media distribution control A device of the same general physical size and shape as a standard audio cassette tape, but which accepts digital information from any of a variety of sources—including for example: Internet transmission, a digital computer, or memory cards (especially digital mem... | 10/14/2008 |
| 7114750 | Self-authenticating documents The present invention provides a durable and self-verifying secure document system and a method for its production, wherein counterfeiting is prevented. The secure document system is potentially useful for a wide variety of documents including, but not limited to, l... | 10/03/2006 |
| 7022905 | Classification of information and use of classifications in searching and retrieval of information A method and apparatus are provided for classification of information and using the classification information in search and retrieval of information. In one embodiment, musical compositions having various highly subjective characteristics and features are classifie... | 04/04/2006 |
| 6944297 | Method and apparatus for reproducing ciphered data A data reproducing apparatus and method is provided for reproducing data that was ciphered during recording in one or more of sector forming, header appending, error correction coding, modulation, and synchronization appending operations used for processing input da... | 09/13/2005 |
| 6671813 | Secure on-line PC postage metering system A system for providing secure access and execution of application software stored on a first computer by a second computer using a communication device while a communication link is maintained between the first and second computers. The present invention ... | 12/30/2003 |
| 6297892 | Device for protecting data transmitted by a facsimile machine The invention relates to a device for protecting data transmitted by a facsimile machine and provides for encrypting and decrypting of data converted to a binary code. The device is detachably connectable to a facsimile machine for receiving the data and ... | 10/02/2001 |
| 6282611 | Digital information system, digital audio signal processor and signal converter In a digital information system for realizing the sale of information or the like having a commercial value in the form of a digital signal, and an audio processor, and signal processor suitably used with the system, when a digital signal is received/deli... | 08/28/2001 |
| 5969283 | Music organizer and entertainment center A music organizer and entertainment center provides a center having a microprocessor, sound card functions and high-volume data storage and retrieval units for playing back music according to a variety of predetermined categories. Music can be played back... | 10/19/1999 |
| 5745579 | Cellular telephone security adapter and method An adapter (10) for a cellular telephone includes a first coupling apparatus (21) disposed on a first surface (30) of the adapter (10). The first coupling apparatus (21) is for engaging coupling apparatus disposed on a rear surface of the cellular telepho... | 04/28/1998 |
| 5056137 | Method and apparatus for encoding and decoding signals In a method and apparatus for encoding signals, signals are passed through a body of a material that modifies a characteristic of signals passing therethrough, such as an acousto-electromagnetic. Energy is applied to the body for establishing a standing w... | 10/08/1991 |
| 4396802 | Aswixs remote speaker and handset set A remote speaker and handset unit is interfaced with a satellite communicons system and a number of common users. A vocoder is interposed between each unit and the communications system to enable a real-time voice modulation-demodulation with suitable en... | 08/02/1983 |
| 4268720 | Scrambler speech transmission and synchronization system A system is provided for time segment scrambling speech encoding, wherein an internal key code is provided for control thereof. The scrambling and reset units are synchronized by start and reset clock pulses. The scrambling unit can also scramble individu... | 05/19/1981 |
| 4117271 | Inductive communication system An apparatus providing multiple conversations over limited range. Pseudo-se modulations and specific address coding permit multiple conversations between a base station and several vehicles or between the vehicles. A variable power source gives even grea... | 09/26/1978 |
