Inventor · disambiguated record
Isao Fukushima
Also filed as: ASADA AKIHIRO · FUKUSHIMA ISAO · KIMURA HIROYUKI · NAKAGAKI HARUSHIGE
39 granted patents·483 citations·filing 1977–1988
98Inventor score
Top patents by PatentIndex Score
39 records- 0186US4651067AApparatus for driving brushless motorHITACHI LTD·Filed 1985·Granted Mar 17, 1987·47 cites·15 claims
- 0284US4591924AMultiplex magnetic recording and reproduction systemHITACHI LTD·Filed 1984·Granted May 27, 1986·40 cites·16 claims
- 0382US4358797AElectronic editing control apparatus for a video tape recorderHITACHI LTD·Filed 1980·Granted Nov 9, 1982·26 cites·2 claims
- 0481US4607293AMagnetic recording and reproduction systemHITACHI LTD·Filed 1983·Granted Aug 19, 1986·24 cites·3 claims
- 0581US4190836ADynamic drive circuit for light-emitting diodesHITACHI LTD·Filed 1977·Granted Feb 26, 1980·27 cites·20 claims
- 0678US4724407AIntegrated filter circuit having switchable selected parallel filter pathsHITACHI LTD·Filed 1986·Granted Feb 9, 1988·27 cites·6 claims
- 0778US4256975ALimiter circuit for removing nose from demodulated signalsHITACHI LTD·Filed 1978·Granted Mar 17, 1981·17 cites·9 claims
- 0876US4847742AMulti-channel inverter circuitHITACHI VIDEO ENG·Filed 1988·Granted Jul 11, 1989·35 cites·9 claims
- 0973US4543516ASpeed and phase control systemHITACHI LTD·Filed 1984·Granted Sep 24, 1985·23 cites·6 claims
- 1072US4198541ASignal holding circuitHITACHI LTD·Filed 1978·Granted Apr 15, 1980·13 cites·16 claims
- 1171US4197505ALimiter circuitHITACHI LTD·Filed 1978·Granted Apr 8, 1980·13 cites·24 claims
- 1267US4503369APower supply for plural brushless DC motorsHITACHI LTD·Filed 1983·Granted Mar 5, 1985·19 cites·14 claims
- 1363US4667168AIntegrated circuit with a phase-locked loopHITACHI VIDEO ENG·Filed 1986·Granted May 19, 1987·19 cites·4 claims
- 1463US4613914AAuto-tracking method and apparatus of a magnetic recording/reproducing apparatusHITACHI MICROCOMPUTER HITACHI·Filed 1985·Granted Sep 23, 1986·14 cites·9 claims
- 1561US4482926AMethod and apparatus for magnetic recording and reproducingHITACHI LTD·Filed 1981·Granted Nov 13, 1984·11 cites·4 claims
- 1657US4713700AA recording circuit having means to automatically set the recording current of a magnetic recording headHITACHI LTD·Filed 1985·Granted Dec 15, 1987·11 cites·15 claims
- 1754US4494056AMotor driving circuitHITACHI LTD·Filed 1983·Granted Jan 15, 1985·12 cites·12 claims
- 1852US4757394AAuto-tracking apparatus of a magnetic recording/reproducing apparatusHITACHI LTD·Filed 1985·Granted Jul 12, 1988·8 cites·8 claims
- 1952US4737864AStill picture recording system with noise detection and frame counting during shift from reproduction of picture in motion to reproduction of still picture including an intermediate slow motion modeHITACHI MICROCUMPUTER ENG·Filed 1986·Granted Apr 12, 1988·9 cites·2 claims
- 2048US4179650AVariable impedance circuitsHITACHI LTD·Filed 1977·Granted Dec 18, 1979·6 cites·7 claims
- 2146US4214299AFrequency-voltage converterHITACHI LTD·Filed 1978·Granted Jul 22, 1980·7 cites·5 claims
- 2246US4122394APhase-shifting multiplication type FM signal demodulation circuitHITACHI LTD·Filed 1977·Granted Oct 24, 1978·7 cites·17 claims
- 2345US4460953ASignal voltage dividing circuitHITACHI LTD·Filed 1982·Granted Jul 17, 1984·7 cites·10 claims
- 2444US4667120AIntegrated filter circuit with variable frequency characteristicsHITACHI LTD·Filed 1985·Granted May 19, 1987·7 cites·4 claims
- 2542US4605901AFrequency-voltage converterHITACHI LTD·Filed 1983·Granted Aug 12, 1986·5 cites·6 claims
- 2642US4198602ALimiter circuit for limiting pulsive noisesHITACHI LTD·Filed 1978·Granted Apr 15, 1980·4 cites·6 claims
- 2741US4647960AVertical contour emphasis de-emphasis circuitHITACHI LTD·Filed 1985·Granted Mar 3, 1987·7 cites·4 claims
- 2841US4146842ANoise muting circuit in fm receiverHITACHI LTD·Filed 1977·Granted Mar 27, 1979·4 cites·9 claims
- 2940US4307326ADrive system for a motorHITACHI LTD·Filed 1980·Granted Dec 22, 1981·6 cites·3 claims
- 3038US4956729AVideo signal preamplifier circuitHITACHI LTD·Filed 1987·Granted Sep 11, 1990·5 cites·2 claims
- 3138US4590438ABipolar transistor circuit with FET constant current sourceHITACHI LTD·Filed 1983·Granted May 20, 1986·3 cites·8 claims
- 3236US4521750ACharacteristic switching circuitHITACHI LTD·Filed 1983·Granted Jun 4, 1985·4 cites·8 claims
- 3336US4518901AMotor control apparatusHITACHI LTD·Filed 1982·Granted May 21, 1985·4 cites·9 claims
- 3434US4338554AAutomatic gain control apparatus for a motor servo systemHITACHI LTD·Filed 1980·Granted Jul 6, 1982·4 cites·8 claims
- 3533US4691246AApparatus for multiplex recording and reproduction of audio and video signalsHITACHI LTD·Filed 1984·Granted Sep 1, 1987·3 cites·4 claims
- 3631US4682096ASwitching regulator system for a motor driving circuitHITACHI LTD·Filed 1985·Granted Jul 21, 1987·1 cites·6 claims
- 3730US4591798AFM signal demodulation circuitHITACHI LTD·Filed 1984·Granted May 27, 1986·0 cites·8 claims
- 3829US4672468AMagnetic recording apparatus with recording of first and second sound signalsHITACHI MICROCUMPUTER ENG·Filed 1985·Granted Jun 9, 1987·3 cites·4 claims
- 3927US4774598ASlow-motion device of magnetic recording and reproducing apparatusHITACHI LTD·Filed 1986·Granted Sep 27, 1988·1 cites·1 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →