Inventor · disambiguated record
Yukinobu Ishigaki
Also filed as: HAGIHARA MASAKI · ISHIGAKI YUKINOBU · YAMAZAKI MASAMI
52 granted patents·1,200 citations·filing 1974–1996
99Inventor score
Top patents by PatentIndex Score
52 records- 0197US4888564APhase-locked loop circuitVICTOR COMPANY OF JAPAN·Filed 1988·Granted Dec 19, 1989·104 cites·6 claims
- 0295US4363007ANoise reduction system having series connected low and high frequency emphasis and de-emphasis filtersVICTOR COMPANY OF JAPAN·Filed 1981·Granted Dec 7, 1982·82 cites·7 claims
- 0394US4943976ASpread spectrum communication systemVICTOR COMPANY OF JAPAN·Filed 1989·Granted Jul 24, 1990·125 cites·5 claims
- 0490US5539770ASpread spectrum modulating apparatus using either PSK or FSK primary modulationVICTOR COMPANY OF JAPAN·Filed 1994·Granted Jul 23, 1996·114 cites·4 claims
- 0585US4977578ASpread spectrum communication systemVICTOR COMPANY OF JAPAN·Filed 1989·Granted Dec 11, 1990·60 cites·23 claims
- 0685US4430754ANoise reducing apparatusVICTOR COMPANY OF JAPAN·Filed 1981·Granted Feb 7, 1984·31 cites·7 claims
- 0784US4166251ASystem for removing interference distortion in the demodulated signal of a frequency-modulated signalVICTOR COMPANY OF JAPAN·Filed 1978·Granted Aug 28, 1979·33 cites·8 claims
- 0882US4399327AVariable directional microphone systemVICTOR COMPANY OF JAPAN·Filed 1981·Granted Aug 16, 1983·62 cites·18 claims
- 0981US4442546ANoise reduction by integrating frequency-split signals with different time constantsVICTOR COMPANY OF JAPAN·Filed 1982·Granted Apr 10, 1984·25 cites·6 claims
- 1079US4539527ANoise reduction by linear interpolation using a dual function amplifier circuitVICTOR COMPANY OF JAPAN·Filed 1984·Granted Sep 3, 1985·23 cites·6 claims
- 1179US4354059AVariable-directivity microphone deviceVICTOR COMPANY OF JAPAN·Filed 1980·Granted Oct 12, 1982·50 cites·7 claims
- 1278US4574390ANoise reduction for stereophonic FM signals by high-speed sampling and linear interpolationVICTOR COMPANY OF JAPAN·Filed 1984·Granted Mar 4, 1986·22 cites·18 claims
- 1377US4027274APhase locked loop circuitMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1975·Granted May 31, 1977·31 cites·2 claims
- 1474US4079330ASystem for demodulating angle-modulated signalsVICTOR COMPANY OF JAPAN·Filed 1976·Granted Mar 14, 1978·18 cites·5 claims
- 1573US4363006ANoise reduction system having series connected variable frequency filtersVICTOR COMPANY OF JAPAN·Filed 1981·Granted Dec 7, 1982·20 cites·7 claims
- 1672US4953178ASpread spectrum communication systemVICTOR COMPANY OF JAPAN·Filed 1989·Granted Aug 28, 1990·38 cites·5 claims
- 1768US4246541ASystem for removing interference distortion in the demodulated signal of a frequency-modulated signalVICTOR COMPANY OF JAPAN·Filed 1979·Granted Jan 20, 1981·16 cites·7 claims
- 1867US5170411AModulation and demodulation system for spread spectrum transmissionVICTOR COMPANY OF JAPAN·Filed 1991·Granted Dec 8, 1992·31 cites·1 claims
- 1966US4577161ANoise reduction by linear interpolation using a dual function amplifier circuitVICTOR COMPANY OF JAPAN·Filed 1984·Granted Mar 18, 1986·15 cites·19 claims
- 2065US4347510AApparatus for automatic selective switching and transmission of input signalsVICTOR COMPANY OF JAPAN·Filed 1980·Granted Aug 31, 1982·27 cites·3 claims
- 2163US5648736AFrequency converting circuitVICTOR COMPANY OF JAPAN·Filed 1995·Granted Jul 15, 1997·14 cites·16 claims
- 2262US4266296AMultipath distortion compensation circuit and methodVICTOR COMPANY OF JAPAN·Filed 1979·Granted May 5, 1981·15 cites·13 claims
- 2361US5832027ASpread spectrum modulating and demodulating apparatus for transmission and reception of FSK and PSK signalsVICTOR COMPANY OF JAPAN·Filed 1996·Granted Nov 3, 1998·30 cites·17 claims
- 2459US5301206ASpread spectrum communication systemVICTOR COMPANY OF JAPAN·Filed 1993·Granted Apr 5, 1994·30 cites·18 claims
- 2556US4449106ANoise reducing apparatusVICTOR COMPANY OF JAPAN·Filed 1982·Granted May 15, 1984·12 cites·5 claims
- 2654US4009455APhase locked loop angle modulation system with large modulation indexMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1975·Granted Feb 22, 1977·10 cites·6 claims
- 2753US4211979ACircuit arrangement for eliminating waveform distortion of an angle-modulated signal transmitted over multipathsVICTOR COMPANY OF JAPAN·Filed 1978·Granted Jul 8, 1980·11 cites·16 claims
- 2851US4790009AScrambler systemVICTOR COMPANY OF JAPAN·Filed 1985·Granted Dec 6, 1988·16 cites·21 claims
- 2951US4626788ACircuit for reconstructing noise-affected signalsVICTOR COMPANY OF JAPAN·Filed 1983·Granted Dec 2, 1986·8 cites·7 claims
- 3050US4531095AImpulse noise reduction by linear interpolation having immunity to white noiseVICTOR COMPANY OF JAPAN·Filed 1984·Granted Jul 23, 1985·8 cites·6 claims
- 3149US3983505ASignal frequency band control systemVICTOR COMPANY OF JAPAN·Filed 1975·Granted Sep 28, 1976·6 cites·14 claims
- 3248US5402442AReceiving device for receiving and demodulating spread spectrum-modulated GPS waveVICTOR COMPANY OF JAPAN·Filed 1994·Granted Mar 28, 1995·17 cites·11 claims
- 3347US4517518ACircuit arrangement for reconstructing noise-affected signalsVICTOR COMPANY OF JAPAN·Filed 1983·Granted May 14, 1985·9 cites·12 claims
- 3447US4066972ASystem for demodulating angle-modulated signalsVICTOR COMPANY OF JAPAN·Filed 1976·Granted Jan 3, 1978·6 cites·9 claims
- 3545US4635004ASingle-sideband generator suitable for integrated circuitsVICTOR COMPANY OF JAPAN·Filed 1985·Granted Jan 6, 1987·8 cites·6 claims
- 3645US4412097AVariable-directivity microphone deviceVICTOR COMPANY OF JAPAN·Filed 1981·Granted Oct 25, 1983·13 cites·2 claims
- 3743US4204091ACancellation of interference distortions caused by intermodulation between FM signals on adjacent channelsVICTOR COMPANY OF JAPAN·Filed 1978·Granted May 20, 1980·7 cites·14 claims
- 3843US4198609APhase tracked loop frequency demodulatorVICTOR COMPANY OF JAPAN·Filed 1978·Granted Apr 15, 1980·7 cites·7 claims
- 3942US4495428ACircuit arrangement for deriving a level control signal using silicon diodesVICTOR COMPANY OF JAPAN·Filed 1982·Granted Jan 22, 1985·5 cites·12 claims
- 4039US5767705AFrequency converting circuitVICTOR COMPANY OF JAPAN·Filed 1996·Granted Jun 16, 1998·5 cites·13 claims
- 4139US4614910AQuarternary differential PSK demodulatorVICTOR COMPANY OF JAPAN·Filed 1985·Granted Sep 30, 1986·8 cites·12 claims
- 4238US4532475AImpulse noise reduction by linear interpolation having a deemphasis characteristicVICTOR COMPANY OF JAPAN·Filed 1984·Granted Jul 30, 1985·4 cites·6 claims
- 4337US5760622AFrequency converting circuitVICTOR COMPANY OF JAPAN·Filed 1996·Granted Jun 2, 1998·6 cites·3 claims
- 4437US4698693AAudio magnetic recording and/or reproducing apparatus utilizing frequency modulationVICTOR COMPANY OF JAPAN·Filed 1985·Granted Oct 6, 1987·5 cites·16 claims
- 4534US5239556ADemodulation system for spread spectrum communicationVICTOR COMPANY OF JAPAN·Filed 1991·Granted Aug 24, 1993·7 cites·9 claims
- 4633US4020409ARectifying and smoothing circuitVICTOR COMPANY OF JAPAN·Filed 1975·Granted Apr 26, 1977·2 cites·4 claims
- 4733US3944754ARecord disc recording system with signal amplitude controlled by stylus arm positionVICTOR COMPANY OF JAPAN·Filed 1974·Granted Mar 16, 1976·2 cites·3 claims
- 4831US4002840AAngle-modulated signal transmission systemMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1975·Granted Jan 11, 1977·1 cites·9 claims
- 4930US4016374AMultichannel record disc recording system with signal level controlMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1975·Granted Apr 5, 1977·0 cites·6 claims
- 5029US4163945ASystem for removing interference distortion in the demodulated signal of a frequency-modulated signalVICTOR COMPANY OF JAPAN·Filed 1978·Granted Aug 7, 1979·1 cites·6 claims
Showing the top 50 of 52 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →