Inventor · disambiguated record
Youhei Ishikawa
Also filed as: ISHIKAWA YOUHEI · MATSUMOTO HARUO · NISHIKAWA TOSHIO
72 granted patents·1 pending application·2,135 citations·filing 1975–2015
99Inventor score
Top patents by PatentIndex Score
73 records- 0198US4821006ADielectric resonator apparatusMURATA MANUFACTURING CO·Filed 1988·Granted Apr 11, 1989·192 cites·30 claims
- 0298US4028652ADielectric resonator and microwave filter using the sameMURATA MANUFACTURING CO·Filed 1975·Granted Jun 7, 1977·141 cites·9 claims
- 0397US6148221AThin film multilayered electrode of high frequency electromagnetic field couplingMURATA MANUFACTURING CO·Filed 1994·Granted Nov 14, 2000·131 cites·20 claims
- 0497US4423397ADielectric resonator and filter with dielectric resonatorMURATA MANUFACTURING CO·Filed 1981·Granted Dec 27, 1983·87 cites·28 claims
- 0596US4639699ADielectric resonator comprising a resonant dielectric pillar mounted in a conductively coated dielectric caseMURATA MANUFACTURING CO·Filed 1983·Granted Jan 27, 1987·74 cites·39 claims
- 0694US4740765ADielectric filterMURATA MANUFACTURING CO·Filed 1986·Granted Apr 26, 1988·105 cites·18 claims
- 0794US4138652ADielectric resonator capable of suppressing spurious modeMURATA MANUFACTURING CO·Filed 1977·Granted Feb 6, 1979·48 cites·6 claims
- 0892US4733208ADielectric filter having impedance changing means coupling adjacent resonatorsMURATA MANUFACTURING CO·Filed 1985·Granted Mar 22, 1988·55 cites·10 claims
- 0991US4728913ADielectric resonatorMURATA MANUFACTURING CO·Filed 1986·Granted Mar 1, 1988·61 cites·14 claims
- 1090US5408690AAntenna supervising apparatus comprising a standing wave ratio measuring unitMURATA MANUFACTURING CO·Filed 1994·Granted Apr 18, 1995·80 cites·11 claims
- 1190US5097236AParallel connection multi-stage band-pass filterMURATA MANUFACTURING CO·Filed 1990·Granted Mar 17, 1992·58 cites·22 claims
- 1289US4692727ADielectric resonator deviceMURATA MANUFACTURING CO·Filed 1986·Granted Sep 8, 1987·47 cites·7 claims
- 1389US4223287AElectrical filter employing transverse electromagnetic mode coaxial resonatorsMURATA MANUFACTURING CO·Filed 1978·Granted Sep 16, 1980·32 cites·26 claims
- 1489US4179673AInterdigital filterMURATA MANUFACTURING CO·Filed 1978·Granted Dec 18, 1979·34 cites·11 claims
- 1587US4623857ADielectric resonator deviceMURATA MANUFACTURING CO·Filed 1985·Granted Nov 18, 1986·39 cites·10 claims
- 1687US4142164ADielectric resonator of improved typeMURATA MANUFACTURING CO·Filed 1977·Granted Feb 27, 1979·29 cites·7 claims
- 1786US4996506ABand elimination filter and dielectric resonator thereforMURATA MANUFACTURING CO·Filed 1989·Granted Feb 26, 1991·43 cites·13 claims
- 1885US4342972AMicrowave device employing coaxial resonatorMURATA MANUFACTURING CO·Filed 1980·Granted Aug 3, 1982·34 cites·14 claims
- 1984US5473296ANonradiative dielectric waveguide and manufacturing method thereofMURATA MANUFACTURING CO·Filed 1994·Granted Dec 5, 1995·39 cites·10 claims
- 2084US4276525ACoaxial resonator with projecting terminal portion and electrical filter employing a coaxial resonator of that typeMURATA MANUFACTURING CO·Filed 1978·Granted Jun 30, 1981·26 cites·4 claims
- 2182US5325077ATE101 triple mode dielectric resonator apparatusMURATA MANUFACTURING CO·Filed 1992·Granted Jun 28, 1994·37 cites·13 claims
- 2282US5184096AParallel connection multi-stage band-pass filter comprising resonators with impedance matching means capacitively coupled to input and output terminalsMURATA MANUFACTURING CO·Filed 1991·Granted Feb 2, 1993·43 cites·9 claims
- 2382US4121181AElectrical branching filterMURATA MANUFACTURING CO·Filed 1977·Granted Oct 17, 1978·23 cites·11 claims
- 2481US4706052ADielectric resonatorMURATA MANUFACTURING CO·Filed 1985·Granted Nov 10, 1987·29 cites·12 claims
- 2581US4151494AElectrical filterMURATA MANUFACTURING CO·Filed 1977·Granted Apr 24, 1979·23 cites·25 claims
- 2679US7229372B2Slippage prevention apparatus of belt-drive continuously variable transmission for automotive vehicleJATCO LTD·Filed 2003·Granted Jun 12, 2007·19 cites·28 claims
- 2779US5159294ANon-reciprocal circuit elementMURATA MANUFACTURING CO·Filed 1991·Granted Oct 27, 1992·33 cites·12 claims
- 2879US4613838ADielectric resonatorMURATA MANUFACTURING CO·Filed 1985·Granted Sep 23, 1986·26 cites·15 claims
- 2979US4143344AMicrowave band-pass filter provided with dielectric resonatorMURATA MANUFACTURING CO·Filed 1977·Granted Mar 6, 1979·21 cites·8 claims
- 3075US6218916B1Electromagnetically coupling nonradiative dielectric waveguidesMURATA MANUFACTURING CO·Filed 1998·Granted Apr 17, 2001·21 cites·14 claims
- 3175US4816788AHigh frequency band-pass filterMURATA MANUFACTURING CO·Filed 1987·Granted Mar 28, 1989·21 cites·25 claims
- 3274US8194879B2Ultra-light sound insulatorISHIKAWA MASAKI·Filed 2006·Granted Jun 5, 2012·9 cites·23 claims
- 3373US5229729ARadio frequency signal combining/sorting apparatusMURATA MANUFACTURING CO·Filed 1992·Granted Jul 20, 1993·28 cites·21 claims
- 3473US4916417AMicrostripline filterMURATA MANUFACTURING CO·Filed 1989·Granted Apr 10, 1990·20 cites·31 claims
- 3573US4727342ADielectric resonatorMURATA MANUFACTURING CO·Filed 1986·Granted Feb 23, 1988·20 cites·5 claims
- 3670US7169070B2Transmission controller of V-belt type continuously variable automatic transmissionJATCO LTD·Filed 2003·Granted Jan 30, 2007·12 cites·15 claims
- 3767US4136320AMethod of constructing dielectric resonator unit and dielectric resonator unit produced therebyMURATA MANUFACTURING CO·Filed 1977·Granted Jan 23, 1979·18 cites·8 claims
- 3866US5049842ADielectric resonator having a cutout portion for receiving an unitary tuning element conforming to the cutout shapeMURATA MANUFACTURING CO·Filed 1988·Granted Sep 17, 1991·19 cites·16 claims
- 3966US4942377ARod type dielectric resonating device with coupling platesMURATA MANUFACTURING CO·Filed 1988·Granted Jul 17, 1990·17 cites·19 claims
- 4066US4721931AStripline filterMURATA MANUFACTURING CO·Filed 1987·Granted Jan 26, 1988·17 cites·8 claims
- 4166US4184130AFilter devices incorporating dielectric resonators and leakage cableMURATA MANUFACTURING CO·Filed 1978·Granted Jan 15, 1980·14 cites·10 claims
- 4265US4245198AHigh frequency filter deviceMURATA MANUFACTURING CO·Filed 1979·Granted Jan 13, 1981·14 cites·13 claims
- 4364US7412907B2Range recognition apparatus for automatic transmissionJATCO LTD·Filed 2005·Granted Aug 19, 2008·4 cites·15 claims
- 4464US4398164ACoaxial resonatorMURATA MANUFACTURING CO·Filed 1981·Granted Aug 9, 1983·21 cites·11 claims
- 4563US5235294AAuto-tuned apparatus for band-pass filterMURATA MANUFACTURING CO·Filed 1992·Granted Aug 10, 1993·25 cites·28 claims
- 4661US6362696B1Device with a nonradiative dielectric waveguide with coupling gapMURATA MANUFACTURING CO·Filed 2000·Granted Mar 26, 2002·6 cites·15 claims
- 4760US9087505B2Ultra-light sound insulatorTAKEHIRO CO LTD·Filed 2014·Granted Jul 21, 2015·1 cites·8 claims
- 4859US5523725ASignal-to-noise enhancerMURATA MANUFACTURING CO·Filed 1995·Granted Jun 4, 1996·14 cites·9 claims
- 4959US4839773ADielectric filterMURATA MANUFACTURING CO·Filed 1988·Granted Jun 13, 1989·13 cites·7 claims
- 5058US6239757B1Communication module for a means of transportationMURATA MANUFACTURING CO·Filed 1997·Granted May 29, 2001·38 cites·56 claims
Showing the top 50 of 73 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →