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Your search returned 37 patents.
( 380/206 in Current US Classification ) |
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| 1 |
| Patent ID | Title | Date Filed |
| 6408076 | Digital video broadcasting
| March 3, 1998 |
| 6330333 | Cryptographic system for wireless communications
| July 3, 1995 |
| 6240184 | Password synchronization
| September 2, 1998 |
| 6216228 | Controlling video or image presentation according to encoded content classification information within the video or image data
| October 14, 1997 |
| 6148320 | Multichannel digital signal generation method and apparatus
| May 18, 1998 |
| 6061793 | Method and apparatus for embedding data, including watermarks, in human perceptible sounds
| August 27, 1997 |
| 5754650 | Simultaneous multichannel television access control system and method
| May 3, 1995 |
| 5682426 | Subscriber site method and apparatus for decoding and selective interdiction of television channels
| April 9, 1996 |
| 5430799 | Multichannel television signal scrambling and descrambling system and method
| April 25, 1994 |
| 5091935 | Method and system for scrambling information signals
| April 10, 1986 |
| 5022078 | Television signal enhancement and scrambling system
| March 8, 1990 |
| 4920566 | Dual loop sinewave descrambler and method of descrambling
| February 1, 1989 |
| 4790010 | Enhanced scrambling method and system for TV signals
| February 24, 1987 |
| 4731838 | AGC circuit used in a CATV receiver
| September 5, 1984 |
| 4589016 | FM television signal receiving circuit
| June 28, 1983 |
| 4581637 | PIN diode modulator
| July 8, 1983 |
| 4568974 | Video scrambling by the application of a variable periodic scrambling waveform
| October 28, 1982 |
| 4489347 | Sine-wave decoding technique
| August 30, 1982 |
| 4454543 | Dynamic video scrambling
| November 6, 1981 |
| 4447828 | Phase change dynamic scrambling
| February 25, 1982 |
| 4353088 | Coding and decoding system for video and audio signals
| May 14, 1980 |
| 4336553 | Method of coding audio and video signals
| May 14, 1980 |
| 4330794 | Multichannel subscription television system
| February 25, 1980 |
| 4313133 | Scrambling and descrambling system in CATV broadcasting system
| September 11, 1979 |
| 4148064 | Jamming circuit for television signals
| January 9, 1978 |
| 4145717 | Subscription TV audio carrier recovery system
| May 11, 1977 |
| 4145716 | Descrambling device in CATV system
| April 22, 1977 |
| 4095258 | Apparatus for decoding scrambled television and similar transmissions
| October 15, 1976 |
| 4064536 | Video scrambler and descrambler apparatus
| February 3, 1976 |
| 4024575 | Catv sine wave coding system
| April 30, 1975 |
| RE34720 | Television signal enhancement and scrambling system
| May 14, 1993 |
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