Inventor · disambiguated record
Kenichi Ishizuka
Also filed as: ISHIZUKA KENICHI
79 granted patents·26 pending applications·262 citations·filing 1996–2025
98Inventor score
Top patents by PatentIndex Score
105 records- 0196US11271314B2Antenna coupling element, antenna device, and electronic deviceMURATA MANUFACTURING CO·Filed 2020·Granted Mar 8, 2022·4 cites·17 claims
- 0296US9698747B2Impedance conversion circuit and antenna deviceMURATA MANUFACTURING CO·Filed 2015·Granted Jul 4, 2017·15 cites·19 claims
- 0395US7375695B2Antenna and wireless communication deviceMURATA MANUFACTURING CO·Filed 2007·Granted May 20, 2008·46 cites·17 claims
- 0494US11646495B2Antenna coupling element, antenna device, and electronic deviceMURATA MANUFACTURING CO·Filed 2022·Granted May 9, 2023·2 cites·6 claims
- 0594US7466277B2Antenna device and wireless communication apparatusMURATA MANUFACTURING CO·Filed 2007·Granted Dec 16, 2008·37 cites·12 claims
- 0693US10348265B2Transformer-type phase shifter, phase-shift circuit, and communication terminal apparatusMURATA MANUFACTURING CO·Filed 2017·Granted Jul 9, 2019·5 cites·16 claims
- 0793US9298873B2Method of designing impedance transformation circuitMURATA MANUFACTURING CO·Filed 2015·Granted Mar 29, 2016·12 cites·17 claims
- 0888US10079587B2Phase shifter, impedance matching circuit, multi/demultiplexer, and communication terminal apparatusMURATA MANUFACTURING CO·Filed 2017·Granted Sep 18, 2018·5 cites·19 claims
- 0987US10305184B2Antenna matching circuit, antenna matching module, antenna device and wireless communication deviceMURATA MANUFACTURING CO·Filed 2016·Granted May 28, 2019·5 cites·18 claims
- 1087US8754738B2Transformer having high degree of coupling, electronic circuit, and electronic deviceKATO NOBORU·Filed 2012·Granted Jun 17, 2014·9 cites·7 claims
- 1186US8309181B2Method of manufacturing polymer filmISHIZUKA KENICHI·Filed 2010·Granted Nov 13, 2012·9 cites·10 claims
- 1285US9724647B2Acidic gas separation module, acidic gas separation device, and telescope prevention plateFUJIFILM CORP·Filed 2015·Granted Aug 8, 2017·3 cites·32 claims
- 1385US8573408B2Crystalline polymer microporous membrane, method for producing the same, and filtration filterISHIZUKA KENICHI·Filed 2010·Granted Nov 5, 2013·7 cites·8 claims
- 1484US9452384B2Acidic gas separation laminate and acidic gas separation module provided with laminateFUJIFILM CORP·Filed 2016·Granted Sep 27, 2016·3 cites·11 claims
- 1584US2025311092A1Radio-frequency filter circuit and electronic deviceMURATA MANUFACTURING CO·Filed 2025·Application pending·0 cites
- 1682US9264011B2Impedance-matching switching circuit, antenna device, high-frequency power amplifying device, and communication terminal apparatusMURATA MANUFACTURING CO·Filed 2013·Granted Feb 16, 2016·6 cites·18 claims
- 1780US10886601B2Electronic deviceMURATA MANUFACTURING CO·Filed 2019·Granted Jan 5, 2021·4 cites·19 claims
- 1879US9248413B2Gas separation composite membrane and method of producing the same, and gas separating module, gas separation apparatus and gas separation method using the sameFUJIFILM CORP·Filed 2014·Granted Feb 2, 2016·3 cites·23 claims
- 1979US8925737B2Crystalline polymer microporous membrane and filtration filterISHIZUKA KENICHI·Filed 2011·Granted Jan 6, 2015·4 cites·12 claims
- 2079US8723753B2Antenna device and communication terminal apparatusKATO NOBORU·Filed 2011·Granted May 13, 2014·4 cites·7 claims
- 2178US9323040B2Eyepiece lens system and image observation deviceISHIZUKA KENICHI·Filed 2012·Granted Apr 26, 2016·4 cites·3 claims
- 2278US8912972B2Coupling degree adjustment circuit, antenna device, and wireless communication deviceMURATA MANUFACTURING CO·Filed 2013·Granted Dec 16, 2014·4 cites·20 claims
- 2378US8279121B2Antenna device and wireless communication apparatusISHIZUKA KENICHI·Filed 2009·Granted Oct 2, 2012·12 cites·8 claims
- 2478US8199057B2Antenna device and wireless communication apparatusISHIZUKA KENICHI·Filed 2009·Granted Jun 12, 2012·10 cites·11 claims
- 2577US10005024B2Acidic-gas separation moduleFUJIFILM CORP·Filed 2016·Granted Jun 26, 2018·2 cites·11 claims
- 2675US12389530B2Filter module, filter element, and electronic deviceMURATA MANUFACTURING CO·Filed 2023·Granted Aug 12, 2025·0 cites·10 claims
- 2775US9837976B2Impedance converting circuit and communication terminal apparatusMURATA MANUFACTURING CO·Filed 2013·Granted Dec 5, 2017·4 cites·20 claims
- 2873US12288119B2Coil componentMURATA MANUFACTURING CO·Filed 2023·Granted Apr 29, 2025·0 cites·17 claims
- 2973US10903571B2Magnetic field coupling element, antenna device, and electronic equipmentMURATA MANUFACTURING CO·Filed 2019·Granted Jan 26, 2021·2 cites·20 claims
- 3073US10340877B2Antenna matching circuit, antenna device, and communication terminal apparatusMURATA MANUFACTURING CO·Filed 2017·Granted Jul 2, 2019·2 cites·20 claims
- 3173US9515632B2Impedance transformation circuit and wireless communication apparatusMURATA MANUFACTURING CO·Filed 2015·Granted Dec 6, 2016·1 cites·16 claims
- 3270US11128046B2Antenna device and electronic equipmentMURATA MANUFACTURING CO·Filed 2019·Granted Sep 21, 2021·1 cites·20 claims
- 3369US12218438B2Antenna device and electronic equipmentMURATA MANUFACTURING CO·Filed 2021·Granted Feb 4, 2025·0 cites·19 claims
- 3469US2024331922A1Electronic componentMURATA MANUFACTURING CO·Filed 2024·Application pending·0 cites
- 3568US9030371B2Antenna device and communication terminal apparatusKATO NOBORU·Filed 2011·Granted May 12, 2015·1 cites·11 claims
- 3667US10277192B2Phase shifter, impedance matching circuit, and communication terminal apparatusMURATA MANUFACTURING CO·Filed 2017·Granted Apr 30, 2019·1 cites·20 claims
- 3766US8739976B2Crystalline polymer microporous membrane, method for producing the same, and filteration filterISHIZUKA KENICHI·Filed 2010·Granted Jun 3, 2014·1 cites·18 claims
- 3866US8643557B2Antenna apparatus and radio communication apparatusNAKANO SHINICHI·Filed 2010·Granted Feb 4, 2014·3 cites·18 claims
- 3965US5865302ASwitch knob having illuminated indicatorNILES PARTS CO LTD·Filed 1997·Granted Feb 2, 1999·19 cites·3 claims
- 4064US12154714B2Multi-terminal chip inductorMURATA MANUFACTURING CO·Filed 2021·Granted Nov 26, 2024·0 cites·9 claims
- 4164US10327317B2Mobile wireless terminalMURATA MANUFACTURING CO·Filed 2017·Granted Jun 18, 2019·1 cites·9 claims
- 4263US12451583B2Power splitter and communication apparatusMURATA MANUFACTURING CO·Filed 2023·Granted Oct 21, 2025·0 cites·20 claims
- 4363US10049807B2Laminated coil component and matching circuitMURATA MANUFACTURING CO·Filed 2017·Granted Aug 14, 2018·0 cites·13 claims
- 4463US8508420B2Antenna device and wireless communication apparatusFUJIEDA SHIGEYUKI·Filed 2009·Granted Aug 13, 2013·7 cites·6 claims
- 4561US11777466B2Matching circuit, matching circuit element, and communication deviceMURATA MANUFACTURING CO·Filed 2021·Granted Oct 3, 2023·0 cites·17 claims
- 4661US9099770B2Communication terminal device and manufacturing method thereofMURATA MANUFACTURING CO·Filed 2013·Granted Aug 4, 2015·1 cites·22 claims
- 4761US2010151188A1Structure having organic-inorganic composite layer and method of manufacturing the sameFUJIFILM CORP·Filed 2009·Application pending·0 cites
- 4861US2010055390A1Microphase-separated structure on flexible substrate, and method of manufacture thereofFUJIFILM CORP·Filed 2009·Application pending·0 cites
- 4960US10840873B2Coil deviceMURATA MANUFACTURING CO·Filed 2018·Granted Nov 17, 2020·0 cites·13 claims
- 5060US10181644B2Antenna circuit and communication deviceMURATA MANUFACTURING CO·Filed 2018·Granted Jan 15, 2019·0 cites·20 claims
Showing the top 50 of 105 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →