TELEVISION ANALOG COMPRESSION CORPORATION

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4760597 Technician set-up unit for and method of cable television converter installation and address assignmentExpiredApr 16, 85Jul 26, 88[H04N, H04H]
4718107 Parental control for CATV convertersExpiredFeb 14, 86Jan 05, 88[H04N, H04H]
4688249 CATV system and method of curtailing reception of unauthorized service channelsExpiredJan 17, 86Aug 18, 87[H04N]
4677467 CATV addressable converter with multi-purpose, bi-directional serial digital data portExpiredApr 16, 85Jun 30, 87[H04N]
4646135 System for allowing two television programs simultaneously to use the normal bandwidth for one program by chrominance time compression and luminance bandwidth reductionExpiredFeb 01, 85Feb 24, 87[H04N]
4646149 Alternate field luminance enhancement in a spectrum conserving television systemExpiredFeb 01, 85Feb 24, 87[H04N]
4646151 Television frame synchronizer with independently controllable input/output ratesExpiredFeb 01, 85Feb 24, 87[H04N]
4646152 Sharpness enhanced equal bandwidth luminance bandwidth compression systemExpiredFeb 01, 85Feb 24, 87[H04N]
4533936 System for encoding and decoding video signalsExpiredMar 28, 83Aug 06, 85[H04N]
4533960 System for encoding and decoding video signalsExpiredOct 21, 82Aug 06, 85[H04N]
4521803 System for compatible transmission of high-resolution TVExpiredOct 07, 82Jun 04, 85[H04N]
4473837 System for encoding and decoding video signalsExpiredMay 28, 82Sep 25, 84[H04N]
4375650 System for processing video signalsExpiredApr 29, 81Mar 01, 83[H04N, G06F]

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