RICA CORPORATION, A CORP. OF

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4918523 Digital video formatting and transmission system and methodExpiredOct 05, 87Apr 17, 90[H04N]
4840457 Angled strut diaphragm springExpiredDec 17, 87Jun 20, 89[G02B]
4841466 Bit-serial integrator circuitryExpiredAug 24, 87Jun 20, 89[G06F]
4817150 Oscillator frequency control arrangement for a stereo decoderExpiredAug 31, 87Mar 28, 89[H04H]
4814889 Automatic focussing systemExpiredOct 07, 87Mar 21, 89[H04N, G03B]
4815003 Structured design method for high density standard cell and macrocell layout of VLSI chipsExpiredJun 19, 87Mar 21, 89[G06F]
4813047 High frequency signal driver for a laser diode and method of forming sameExpiredOct 05, 87Mar 14, 89[H01P]
4802000 Video switching apparatus having interference prevention featureExpiredDec 22, 87Jan 31, 89[H04N]
4789807 Electron gun assembly having a reinforced heater tabExpiredAug 31, 87Dec 06, 88[H01J]
4782269 Sawtooth generator with s-correctionExpiredOct 22, 87Nov 01, 88[H01J, H04N]
4782383 Apparatus for processing high frequency edge information in a widescreen television systemExpiredAug 26, 87Nov 01, 88[H04N]
4769916 Device for measuring the periphery of an objectExpiredOct 13, 87Sep 13, 88[G01B]
4767949 Multibit digital threshold comparatorExpiredMay 01, 87Aug 30, 88[H03K, G05B, G06F]
4764704 Color cathode-ray tube having a three-lens electron gunExpiredDec 04, 87Aug 16, 88[H01J]

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