Inventor · disambiguated record
Keiichi Ichikawa
Also filed as: ICHIKAWA KEIICHI
57 granted patents·11 pending applications·197 citations·filing 1988–2025
98Inventor score
Files withMURATA MANUFACTURING CO41ICHIKAWA KEIICHI15KIKKOMAN CORP6NGK SPARK PLUG CO2KURIHARA TAKESHI1
Top patents by PatentIndex Score
68 records- 0195US9853460B2Power conversion circuit, power transmission system, and power conversion systemMURATA MANUFACTURING CO·Filed 2015·Granted Dec 26, 2017·19 cites·6 claims
- 0292US11629341B2Method for producing selenoneineKIKKOMAN CORP·Filed 2021·Granted Apr 18, 2023·2 cites·12 claims
- 0390US8536739B2Power transfer system and noncontact charging deviceICHIKAWA KEIICHI·Filed 2011·Granted Sep 17, 2013·15 cites·18 claims
- 0487US10403431B2Coil component, coil module, and method for manufacturing coil componentMURATA MANUFACTURING CO·Filed 2016·Granted Sep 3, 2019·3 cites·13 claims
- 0585US9000621B2Power transmitting device, power receiving device, and power transmission systemICHIKAWA KEIICHI·Filed 2012·Granted Apr 7, 2015·7 cites·9 claims
- 0685US8552596B2Power transmitting apparatus and power transmission systemICHIKAWA KEIICHI·Filed 2011·Granted Oct 8, 2013·12 cites·15 claims
- 0785US8445246B2Flavin-binding glucose dehydrogenasesTAJIMA RYOKO·Filed 2010·Granted May 21, 2013·11 cites·20 claims
- 0883US10714977B2Voltage detection circuit, power transmission device, and power transmission systemMURATA MANUFACTURING CO·Filed 2017·Granted Jul 14, 2020·4 cites·12 claims
- 0981US11028400B2Method for producing selenoneineKIKKOMAN CORP·Filed 2016·Granted Jun 8, 2021·2 cites·8 claims
- 1081US8476789B2Power transmitting apparatus, power receiving apparatus, and power transmission systemICHIKAWA KEIICHI·Filed 2011·Granted Jul 2, 2013·8 cites·23 claims
- 1180US8907617B2Power transfer system and noncontact charging deviceICHIKAWA KEIICHI·Filed 2011·Granted Dec 9, 2014·7 cites·11 claims
- 1278US10158293B2Power supply module and mounting structure thereforMURATA MANUFACTURING CO·Filed 2017·Granted Dec 18, 2018·1 cites·18 claims
- 1378US9493814B2Flavin-binding glucose dehydrogenase having improved substrate specificityKIKKOMAN CORP·Filed 2012·Granted Nov 15, 2016·2 cites·9 claims
- 1477US9831917B2Electric field coupling type wireless electric power transmitting system and electric power receiving apparatus included in the sameMURATA MANUFACTURING CO·Filed 2014·Granted Nov 28, 2017·5 cites·18 claims
- 1577US9685794B2Power transmission systemMURATA MANUFACTURING CO·Filed 2015·Granted Jun 20, 2017·3 cites·18 claims
- 1676US9846183B2Parameter derivation methodMURATA MANUFACTURING CO·Filed 2015·Granted Dec 19, 2017·3 cites·16 claims
- 1776US9172276B2Power transmission device and power transfer systemICHIKAWA KEIICHI·Filed 2012·Granted Oct 27, 2015·5 cites·11 claims
- 1876US8937409B2Power transfer system and noncontact charging deviceICHIKAWA KEIICHI·Filed 2011·Granted Jan 20, 2015·5 cites·12 claims
- 1975US10760107B2Transformed fungus having enhanced ergothioneine productivity and method for producing ergothioneineKIKKOMAN CORP·Filed 2015·Granted Sep 1, 2020·1 cites·9 claims
- 2075US9245682B2TransformerMIURA HIROKI·Filed 2012·Granted Jan 26, 2016·4 cites·11 claims
- 2174US8987941B2Power transmission systemICHIKAWA KEIICHI·Filed 2011·Granted Mar 24, 2015·5 cites·19 claims
- 2273US9461507B2Wireless power transmission systemMURATA MANUFACTURING CO·Filed 2014·Granted Oct 4, 2016·4 cites·20 claims
- 2372US10014720B2Power transmission systemMURATA MANUFACTURING CO·Filed 2015·Granted Jul 3, 2018·2 cites·20 claims
- 2472US9755460B2Power reception device, power transmission device and wireless power transmission systemMURATA MANUFACTURING CO·Filed 2014·Granted Sep 5, 2017·4 cites·14 claims
- 2571US9300135B2Power transfer system and noncontact charging deviceMURATA MANUFACTURING CO·Filed 2013·Granted Mar 29, 2016·3 cites·18 claims
- 2671US8772978B2Power transmitting apparatus, power receiving apparatus, and wireless power transmission systemICHIKAWA KEIICHI·Filed 2011·Granted Jul 8, 2014·5 cites·14 claims
- 2769US10938244B2Bidirectional wireless power transmission systemMURATA MANUFACTURING CO·Filed 2019·Granted Mar 2, 2021·2 cites·20 claims
- 2869US9735589B2Power transmission device and power transmission control methodMURATA MANUFACTURING CO·Filed 2014·Granted Aug 15, 2017·4 cites·18 claims
- 2968US9281719B2High-frequency power device, power transmission device, and power transfer systemICHIKAWA KEIICHI·Filed 2012·Granted Mar 8, 2016·3 cites·12 claims
- 3068US2025226582A1Antenna moduleMURATA MANUFACTURING CO·Filed 2025·Application pending·0 cites
- 3167US4912368ACold cathode discharge tube with series connected capacitorSTANLEY ELECTRIC CO LTD·Filed 1988·Granted Mar 27, 1990·16 cites·12 claims
- 3266US9246553B2Power reception device and power transmission deviceICHIKAWA KEIICHI·Filed 2012·Granted Jan 26, 2016·2 cites·20 claims
- 3365US11282639B2Antenna device and electronic apparatusMURATA MANUFACTURING CO·Filed 2019·Granted Mar 22, 2022·0 cites·20 claims
- 3465US9698629B2Wireless power transmission system, power transmitting device, and power receiving deviceMURATA MANUFACTURING CO·Filed 2013·Granted Jul 4, 2017·2 cites·16 claims
- 3565US8160891B2Method and system for distributing disaster informationICHIKAWA KEIICHI·Filed 2002·Granted Apr 17, 2012·1 cites·6 claims
- 3665US2025010577A1Multilayer substrateMURATA MANUFACTURING CO·Filed 2024·Application pending·0 cites
- 3763US12476354B2Antenna element and electronic deviceMURATA MANUFACTURING CO·Filed 2023·Granted Nov 18, 2025·0 cites·22 claims
- 3863US11186855B2Transformed fungus having enhanced ergothioneine productivity and method for producing ergothioneineKIKKOMAN CORP·Filed 2020·Granted Nov 30, 2021·0 cites·10 claims
- 3961US9866038B2Wireless power transmission systemMURATA MANUFACTURING CO·Filed 2015·Granted Jan 9, 2018·1 cites·20 claims
- 4060US12438261B2Antenna element, electronic device, and method for manufacturing antenna elementMURATA MANUFACTURING CO·Filed 2023·Granted Oct 7, 2025·0 cites·20 claims
- 4160US12418095B2Electronic device including bent portionMURATA MANUFACTURING CO·Filed 2023·Granted Sep 16, 2025·0 cites·19 claims
- 4260US6453723B1Gas sensor deviceNGK SPARK PLUG CO·Filed 1999·Granted Sep 24, 2002·24 cites·18 claims
- 4358US12120820B2Electronic deviceMURATA MANUFACTURING CO·Filed 2022·Granted Oct 15, 2024·0 cites·20 claims
- 4456US12398411B2Method for producing selenoneineKIKKOMAN CORP·Filed 2019·Granted Aug 26, 2025·0 cites·6 claims
- 4556US8615402B2Method and system for distributing disaster informationICHIKAWA KEIICHI·Filed 2012·Granted Dec 24, 2013·0 cites·9 claims
- 4653US10459010B2Current detection element including a coil-shaped current detection conductor, transmission device, and electric power transmission systemMURATA MANUFACTURING CO·Filed 2017·Granted Oct 29, 2019·0 cites·11 claims
- 4750US10388450B2Inductor module and electric power transmission systemMURATA MANUFACTURING CO·Filed 2017·Granted Aug 20, 2019·0 cites·11 claims
- 4849US9369009B2Power transmitting device and power transmission systemMURATA MANUFACTURING CO·Filed 2013·Granted Jun 14, 2016·0 cites·20 claims
- 4948US9876362B2Power transfer systemMURATA MANUFACTURING CO·Filed 2014·Granted Jan 23, 2018·0 cites·17 claims
- 5048US9531216B2Power transmission system and power receiving apparatusMURATA MANUFACTURING CO·Filed 2013·Granted Dec 27, 2016·0 cites·20 claims
Showing the top 50 of 68 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →