Assignee
QUADRACAST SYSTEMS
6 granted patents·182 citations·filing 1974–1978
Top patents by PatentIndex Score
6 records- 0195US4227256AAM Broadcast tuner with automatic gain controlQUADRACAST SYSTEMS·Filed 1978·Granted Oct 7, 1980·152 cites·3 claims
- 0264US4061882AQuadrature multiplying four-channel demodulatorQUADRACAST SYSTEMS·Filed 1976·Granted Dec 6, 1977·16 cites·5 claims
- 0340US4062547AAutomatic control for phonographs playing records of different speedsQUADRACAST SYSTEMS·Filed 1976·Granted Dec 13, 1977·4 cites·6 claims
- 0438US3937902ACartridge muting circuitQUADRACAST SYSTEMS·Filed 1974·Granted Feb 10, 1976·4 cites·3 claims
- 0537US3943294AMulti-mono FM systemQUADRACAST SYSTEMS·Filed 1974·Granted Mar 9, 1976·4 cites·4 claims
- 0631US4150336AAM/FM Intermediate frequency gain stageQUADRACAST SYSTEMS·Filed 1978·Granted Apr 17, 1979·2 cites·3 claims
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