Assignee
HITACHI VIDEO ENG
JP·13 granted patents·230 citations·filing 1986–1992
Top patents by PatentIndex Score
13 records- 0188US4803449AFilter combining surface acoustic wave resonatorsHITACHI VIDEO ENG·Filed 1987·Granted Feb 7, 1989·56 cites·18 claims
- 0281US4775966AOptical information recording apparatus with eccentricity correction circuitHITACHI VIDEO ENG·Filed 1986·Granted Oct 4, 1988·28 cites·2 claims
- 0376US4847742AMulti-channel inverter circuitHITACHI VIDEO ENG·Filed 1988·Granted Jul 11, 1989·35 cites·9 claims
- 0466US5088082ADust removing system for optical disk deviceHITACHI VIDEO ENG·Filed 1990·Granted Feb 11, 1992·18 cites·18 claims
- 0563US4667168AIntegrated circuit with a phase-locked loopHITACHI VIDEO ENG·Filed 1986·Granted May 19, 1987·19 cites·4 claims
- 0659US4899235AMagnetic tape loading mechanism and methodHITACHI VIDEO ENG·Filed 1988·Granted Feb 6, 1990·11 cites·9 claims
- 0758US5134465AColor detecting circuitHITACHI VIDEO ENG·Filed 1990·Granted Jul 28, 1992·17 cites·14 claims
- 0853US4985788ARecording and reproducing apparatusHITACHI VIDEO ENG·Filed 1988·Granted Jan 15, 1991·9 cites·8 claims
- 0946US5019754AHorizontal deflection circuitHITACHI VIDEO ENG·Filed 1989·Granted May 28, 1991·11 cites·5 claims
- 1045US4794478AImproved loading device for cassette recording playback apparatusHITACHI VIDEO ENG·Filed 1986·Granted Dec 27, 1988·11 cites·5 claims
- 1144US5321567ATape loading mechanism for a rotating drum and cassette tape recording and reproducing apparatusHITACHI VIDEO ENG·Filed 1992·Granted Jun 14, 1994·5 cites·2 claims
- 1243US4745494ASystem for correcting time base error of information reproducing apparatusHITACHI VIDEO ENG·Filed 1986·Granted May 17, 1988·5 cites·23 claims
- 1342US4862193AThermal recording headHITACHI VIDEO ENG·Filed 1988·Granted Aug 29, 1989·5 cites·6 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →