Inventor · disambiguated record
Masayuki Ohki
Also filed as: OHKI MASAYUKI
30 granted patents·1,191 citations·filing 1996–2012
98Inventor score
Files withHITACHI LTD22HITACHI GLOBAL STORAGE TECH3HIRATA KOJI2HITACHI CONSUMER ELECTRONICS2HASUO TOMOTAKE1
Top patents by PatentIndex Score
30 records- 0194USD555185SVideo projectorHITACHI LTD·Filed 2006·Granted Nov 13, 2007·66 cites·1 claims
- 0293US8313199B2Projection display system including lens group and reflecting mirrorHIRATA KOJI·Filed 2007·Granted Nov 20, 2012·16 cites·18 claims
- 0392US6016954ACard holder-type balance readerHITACHI LTD·Filed 1997·Granted Jan 25, 2000·199 cites·10 claims
- 0489US6000607AIC card reader/writer and method of operation thereofHITACHI LTD·Filed 1996·Granted Dec 14, 1999·110 cites·14 claims
- 0585USD575811SVideo projectorHITACHI LTD·Filed 2007·Granted Aug 26, 2008·32 cites·1 claims
- 0682USD530343SHousing for a storage deviceHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Oct 17, 2006·29 cites·1 claims
- 0780US9022581B2Projection display system with two reflecting mirrorsHIRATA KOJI·Filed 2012·Granted May 5, 2015·4 cites·23 claims
- 0878US5952639ADepositing, withdrawal, balance check, exchange and transfer of electronic money in automatic cash handling machineHITACHI LTD·Filed 1996·Granted Sep 14, 1999·252 cites·18 claims
- 0974US5929427APortable card reader/writerHITACHI LTD·Filed 1997·Granted Jul 27, 1999·50 cites·3 claims
- 1072USD437851SIC card reader and writerHITACHI LTD·Filed 2000·Granted Feb 20, 2001·20 cites·1 claims
- 1172US5945652AElectronic wallet and method for operating the sameHITACHI LTD·Filed 1997·Granted Aug 31, 1999·137 cites·29 claims
- 1270USD600661STelevision receiverHITACHI LTD·Filed 2006·Granted Sep 22, 2009·18 cites·1 claims
- 1370USD585035STelevision receiverHITACHI LTD·Filed 2008·Granted Jan 20, 2009·17 cites·1 claims
- 1469USD530341SHousing for a storage deviceHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Oct 17, 2006·17 cites·1 claims
- 1565USD543206SHousing for a storage deviceHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted May 22, 2007·15 cites·1 claims
- 1664US5895903ATerminal for portable IC cardHITACHI LTD·Filed 1997·Granted Apr 20, 1999·84 cites·26 claims
- 1763USD627387SVideo projectorHITACHI CONSUMER ELECTRONICS·Filed 2009·Granted Nov 16, 2010·12 cites·1 claims
- 1861USD627386SVideo projectorHITACHI CONSUMER ELECTRONICS·Filed 2009·Granted Nov 16, 2010·11 cites·1 claims
- 1961USD393835SSmart card reader/writerHITACHI LTD·Filed 1997·Granted Apr 28, 1998·11 cites·1 claims
- 2059USD423471SIC card reader and writerHITACHI LTD·Filed 1999·Granted Apr 25, 2000·10 cites·1 claims
- 2158US8593699B2Image sensor module and image sensorHASUO TOMOTAKE·Filed 2011·Granted Nov 26, 2013·2 cites·19 claims
- 2257USD446799SVideo camera with digital video disc playerHITACHI LTD·Filed 2000·Granted Aug 21, 2001·10 cites·1 claims
- 2353USD393527SElectronic value automated teller machineHITACHI LTD·Filed 1997·Granted Apr 14, 1998·8 cites·1 claims
- 2448USD393277SElectronic value processing deviceHITACHI LTD·Filed 1997·Granted Apr 7, 1998·6 cites·1 claims
- 2546USD408438SElectronic walletHITACHI LTD·Filed 1997·Granted Apr 20, 1999·5 cites·1 claims
- 2643US6016957AIC card reader/writer and method of operation thereofHITACHI LTD·Filed 1998·Granted Jan 25, 2000·14 cites·16 claims
- 2739US6339638B1Telephone used for electronic money card transaction and method of operation of the sameHITACHI LTD·Filed 1999·Granted Jan 15, 2002·28 cites·3 claims
- 2836USD409229SElectronic walletHITACHI LTD·Filed 1998·Granted May 4, 1999·2 cites·1 claims
- 2933US6042002AHolding apparatus for a plurality of IC cards facilitating transactions of electronic money among the IC cardsHITACHI LTD·Filed 1996·Granted Mar 28, 2000·6 cites·41 claims
- 3030USD409214SVideo camera with combined video tape recorderHITACHI LTD·Filed 1998·Granted May 4, 1999·0 cites·1 claims
Join the waitlist — get patent alerts
Get an alert when Masayuki Ohki files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →