Inventor · disambiguated record
Sadahiko Yamashita
Also filed as: YAMASHITA SADAHIKO
33 granted patents·1,109 citations·filing 1974–1987
98Inventor score
Files withMATSUSHITA ELECTRIC INDUSTRIAL CO LTD33
Top patents by PatentIndex Score
33 records- 0198US4340975AMicrowave mixing circuit and a VHF-UHF tuner having the mixing circuitMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1980·Granted Jul 20, 1982·156 cites·29 claims
- 0297US4423396ABandpass filter for UHF bandMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1981·Granted Dec 27, 1983·88 cites·9 claims
- 0395US4506241ACoaxial dielectric resonator having different impedance portions and method of manufacturing the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1982·Granted Mar 19, 1985·67 cites·13 claims
- 0495US4292610ATemperature compensated coaxial resonator having inner, outer and intermediate conductorsMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1980·Granted Sep 29, 1981·68 cites·6 claims
- 0593US4553264ADouble superheterodyne tunerMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1983·Granted Nov 12, 1985·71 cites·7 claims
- 0693US4268809AMicrowave filter having means for capacitive interstage coupling between transmission linesMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1979·Granted May 19, 1981·44 cites·17 claims
- 0792US4371853AStrip-line resonator and a band pass filter having the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1980·Granted Feb 1, 1983·48 cites·18 claims
- 0890US4382238ABand stop filter and circuit arrangement for common antennaMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1980·Granted May 3, 1983·41 cites·18 claims
- 0990US4121182AElectrical tuning circuitMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1977·Granted Oct 17, 1978·35 cites·15 claims
- 1089US4726072ADouble converter tunerMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1987·Granted Feb 16, 1988·80 cites·21 claims
- 1187US4419768AWideband tuner for VHF, CATV and UHF television signalsMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1981·Granted Dec 6, 1983·46 cites·16 claims
- 1281US4016568AMethod and system for measuring doppler frequency shift of an echoMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1974·Granted Apr 5, 1977·36 cites·10 claims
- 1380US4389624ADielectric-loaded coaxial resonator with a metal plate for wide frequency adjustmentsMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1981·Granted Jun 21, 1983·26 cites·6 claims
- 1479US4536724AVoltage-controlled oscillator having three or more varactor diodesMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1982·Granted Aug 20, 1985·28 cites·11 claims
- 1578US4720688AFrequency synthesizerMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1986·Granted Jan 19, 1988·35 cites·24 claims
- 1676US4661998ADouble superheterodyne tunerMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1984·Granted Apr 28, 1987·31 cites·5 claims
- 1775US4631506AFrequency-adjustable coaxial dielectric resonator and filter using the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1983·Granted Dec 23, 1986·22 cites·1 claims
- 1874US4583064AStrip-line resonatorMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1984·Granted Apr 15, 1986·21 cites·20 claims
- 1972US4592095AMicrowave FET mixer arranged to receive RF input at gate electrodeMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1984·Granted May 27, 1986·21 cites·10 claims
- 2072US4059815ACoaxial cavity resonatorMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1976·Granted Nov 22, 1977·16 cites·10 claims
- 2169US4449108ABand-stop filter for VHF-UHF bandMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1982·Granted May 15, 1984·19 cites·7 claims
- 2263US4214217AElectronic tuning circuit having image trapping elementMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1979·Granted Jul 22, 1980·13 cites·8 claims
- 2360US4679003AFrequency divider circuit and frequency synthesizer using the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1986·Granted Jul 7, 1987·15 cites·14 claims
- 2460US4651344AVHF-UHF mixer having a balunMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1985·Granted Mar 17, 1987·17 cites·9 claims
- 2559US4437076ACoaxial filter having a plurality of resonators each having a bottomed cylinderMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1982·Granted Mar 13, 1984·14 cites·12 claims
- 2657US4224587AComb-line bandpass filterMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1978·Granted Sep 23, 1980·11 cites·7 claims
- 2755US4590443ATransistor oscillator with compensating circuit for variable collector-base capacitanceMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1985·Granted May 20, 1986·14 cites·10 claims
- 2847US4315333ACircuit arrangement for a wide-band VHF-UHF television double superheterodyne receiverMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1980·Granted Feb 9, 1982·11 cites·6 claims
- 2942US4638180AFrequency divider circuitsMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1985·Granted Jan 20, 1987·6 cites·15 claims
- 3037US4361820AHybrid microwave circuitMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1980·Granted Nov 30, 1982·4 cites·5 claims
- 3134US4412351AMicrowave mixing circuitMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1981·Granted Oct 25, 1983·3 cites·12 claims
- 3234US4254390ACompact electronic tuning deviceMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1979·Granted Mar 3, 1981·2 cites·4 claims
- 3331US4214218AImpedance matched tuning device having image trapping circuitMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1979·Granted Jul 22, 1980·0 cites·3 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →