Inventor · disambiguated record
Yoshihiro Ikefuji
Also filed as: IKEFUJI YOSHIHIRO
40 granted patents·5 pending applications·885 citations·filing 1984–2018
98Inventor score
Top patents by PatentIndex Score
45 records- 0192US6747546B1Data communication transponder and communications system employing itROHM CO LTD·Filed 2000·Granted Jun 8, 2004·101 cites·14 claims
- 0289US10778046B2Power transmitting device and non-contact power feeding systemROHM CO LTD·Filed 2016·Granted Sep 15, 2020·11 cites·11 claims
- 0389US6802008B1IC card and IC chip moduleROHM CO LTD·Filed 1998·Granted Oct 5, 2004·111 cites·14 claims
- 0485US10432029B2Power transmission device and non-contact power feeding systemROHM CO LTD·Filed 2016·Granted Oct 1, 2019·5 cites·10 claims
- 0581US7003678B2IC card and IC chip moduleROHM CO LTD·Filed 2004·Granted Feb 21, 2006·27 cites·14 claims
- 0680US10998767B2Power transmission device and non-contact power feeding system for transmitting electric power to power reception device by magnetic resonanceROHM CO LTD·Filed 2016·Granted May 4, 2021·4 cites·28 claims
- 0779US7961918B2Personal identification device and electronic apparatus provided therewithROHM CO LTD·Filed 2007·Granted Jun 14, 2011·14 cites·12 claims
- 0878US10700554B2Power reception device and non-contact power feeding systemROHM CO LTD·Filed 2016·Granted Jun 30, 2020·3 cites·9 claims
- 0978US7773271B2Filter circuit, and image sensor, image sensor module, and image reading apparatus provided therewithROHM CO LTD·Filed 2006·Granted Aug 10, 2010·5 cites·20 claims
- 1075US10923962B2Power transmission device non-contact power feeding system with detection circuit to detect current amplitude in transmission-side coilROHM CO LTD·Filed 2016·Granted Feb 16, 2021·3 cites·10 claims
- 1175US5774062ATag responsive to high-frequecy for varying capacitance of tuning capacitorROHM CO LTD·Filed 1995·Granted Jun 30, 1998·52 cites·8 claims
- 1274US6478228B1Card mounted with circuit chip and circuit chip moduleROHM CO LTD·Filed 1997·Granted Nov 12, 2002·50 cites·1 claims
- 1373US10530187B2Non-contact power supply systemROHM CO LTD·Filed 2015·Granted Jan 7, 2020·2 cites·9 claims
- 1473US5721535ATag responsive to high frequency for varying capacitance of capacitor in power sourceROHM CO LTD·Filed 1995·Granted Feb 24, 1998·46 cites·5 claims
- 1572US10756559B2Non-contact power feeding systemROHM CO LTD·Filed 2016·Granted Aug 25, 2020·2 cites·11 claims
- 1672US6679424B2Non contact type IC cardROHM CO LTD·Filed 2002·Granted Jan 20, 2004·4 cites·1 claims
- 1772US6624743B1Automatic adjusting responder with no self-contained power supplyROHM CO LTD·Filed 1997·Granted Sep 23, 2003·48 cites·12 claims
- 1872US6601770B1Response device in contact/contactless IC card communication systemROHM CO LTD·Filed 1998·Granted Aug 5, 2003·43 cites·25 claims
- 1972US6422473B1Circuit chip mounted card and circuit chip moduleROHM CO LTD·Filed 1997·Granted Jul 23, 2002·45 cites·4 claims
- 2070US6724296B1Communications system having an authentication functionROHM CO LTD·Filed 2000·Granted Apr 20, 2004·21 cites·13 claims
- 2170US6181001B1Card mounted with circuit chip and circuit chip moduleROHM CO LTD·Filed 1997·Granted Jan 30, 2001·39 cites·24 claims
- 2268US6498923B2Telecommunication deviceROHM CO LTD·Filed 1997·Granted Dec 24, 2002·37 cites·3 claims
- 2368US6491228B1IC cardROHM CO LTD·Filed 1997·Granted Dec 10, 2002·34 cites·4 claims
- 2466US10601258B2Non-contact power supply system and power transmission deviceROHM CO LTD·Filed 2017·Granted Mar 24, 2020·1 cites·16 claims
- 2565US10424977B2Charging system using NFC, mobile device chargeable by NFC, and chargerROHM CO LTD·Filed 2016·Granted Sep 24, 2019·1 cites·20 claims
- 2663US9819213B2Power reception apparatus, power transmission apparatus, non-contact power supply system, power reception method, and power transmission methodROHM CO LTD·Filed 2015·Granted Nov 14, 2017·1 cites·19 claims
- 2759US6654466B1Data communication equipment, data communication system, and data communication methodROHM CO LTD·Filed 1998·Granted Nov 25, 2003·25 cites·36 claims
- 2858US6680773B2Liquid crystal display device and method of making semiconductor chips for liquid crystal display deviceROHM CO LTD·Filed 2001·Granted Jan 20, 2004·5 cites·6 claims
- 2957US6404644B1Non-contact IC cardROHM CO LTD·Filed 1998·Granted Jun 11, 2002·22 cites·12 claims
- 3054US6404478B1Liquid crystal display having capacitors on a substrate with equal resistance conductors electrically connecting the capacitors to a chipROHM CO LTD·Filed 2001·Granted Jun 11, 2002·5 cites·9 claims
- 3153US6742117B1IC card and method of using IC cardROHM CO LTD·Filed 1998·Granted May 25, 2004·79 cites·10 claims
- 3251US5029203ASide tone preventive circuit for telephoneROHM CO LTD·Filed 1989·Granted Jul 2, 1991·12 cites·16 claims
- 3345US7221427B2Method of making semiconductor chips for liquid crystal display deviceROHM CO LTD·Filed 2003·Granted May 22, 2007·1 cites·2 claims
- 3445US2006077272A1Optical signal processor and image processing apparatusROHM CO LTD·Filed 2005·Application pending·0 cites
- 3543US2019140483A1Power transmission device and non-contact power feeding systemROHM CO LTD·Filed 2018·Application pending·0 cites
- 3641US5311296AVideo signal generator circuit and video image processing device using the sameROHM CO LTD·Filed 1992·Granted May 10, 1994·7 cites·12 claims
- 3736US4628249APower supply having a predetermined value of input impedanceROHN COMPANY LIMITED·Filed 1984·Granted Dec 9, 1986·5 cites·1 claims
- 3833US5260995AElectric power circuit for telephone set useROHM CO LTD·Filed 1990·Granted Nov 9, 1993·4 cites·7 claims
- 3933US5042066ADialer circuitROHM CO LTD·Filed 1989·Granted Aug 20, 1991·2 cites·11 claims
- 4033US5031212ADialer circuitROHM CO LTD·Filed 1990·Granted Jul 9, 1991·5 cites·5 claims
- 4131US6842859B1Authentication system, authentication device, authentication data producing device, and authentication methodROHM CO LTD·Filed 1998·Granted Jan 11, 2005·3 cites·14 claims
- 4230US5610513ACross coil meter with correction for resistance variationsROHM CO LTD·Filed 1995·Granted Mar 11, 1997·0 cites·9 claims
- 4330US2002162893A1Non-contact ic cardFiled 1998·Application pending·0 cites
- 4430US2002050635A1Integrated circuit deviceROHM CO LTD·Filed 2001·Application pending·0 cites
- 4529US2001045468A1Ic cardFiled 1997·Application pending·0 cites
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