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| 5058159 | Method and system for scrambling and descrambling audio informati... |
| 5056106 | Golf course ranging and direction-finding system using spread-spe... |
| 5056141 | Method and apparatus for the identification of personnel |
| 5052040 | Multiple user stored data cryptographic labeling system and metho... |
| 5048053 | Detecting and tracking circuit for component PN codes |
| 5036537 | Geographic black-out method for direct broadcast satellite system |
| 5034982 | Lenticular security screen production method |
| 5029184 | Low probability of intercept communication system |
| 5025306 | Assembly of semiconductor chips |
| 5023887 | Data transmission system using spread spectrum communication |
| 5023908 | Method and apparatus for personal identification |
| 5022077 | Apparatus and method for preventing unauthorized access to BIOS i... |
| 5020075 | Direct sequence spread spectrum modulation apparatus |
| 5016275 | Buffered encryption/decryption |
| 5016274 | On-line/off-line digital signing |
| 5014315 | Digital telephone system |
| 5014311 | Integrated circuit with an access-controlled data memory |
| 5011279 | Fiber-optical sensor |
| 5010571 | Metering retrieval of encrypted data stored in customer data retr... |
| 5008935 | Efficient method for encrypting superblocks of data |
| 5008937 | Scrambled-communication system using adaptive transversal filters... |
| 5007084 | Payment Authorization and Information Device |
| 5007085 | Remotely sensed personal stylus |
| 5007083 | Secure computer |
| 5003593 | Teleconferencing method for a secure key management system |
| 5003591 | Functionally modifiable cable television converter system |
| 5003600 | Diffraction gratings used as identifying markers |
| 5003552 | Carrier aided code tracking loop |
| 5003599 | In-band framing method and apparatus |
| 5003596 | Method of cryptographically transforming electronic digital data ... |
| 5003595 | Secure dial access to computer systems |
| 5001749 | Thermally-activated receiving medium for use in a facsimile trans... |
| 5001753 | Crytographic system and process and its application |
| 5001750 | Secret communication control apparatus |
| 5001723 | Sinusoidal M-ary orthogonal keyed decoding |
| 4998261 | Spread spectrum signal demodulator |
| 4998279 | Method and apparatus for personal verification utilizing nonpredi... |
| 4996711 | Selected-exponent signature systems |