Inventor · disambiguated record
Koichi Oka
Also filed as: OKA KOICHI
22 granted patents·3 pending applications·224 citations·filing 1983–2013
95Inventor score
Top patents by PatentIndex Score
25 records- 0184US7176464B2Method of and apparatus for determining the amount of impurity in gasOTSUKA DENSHI KK·Filed 2005·Granted Feb 13, 2007·14 cites·6 claims
- 0278US5564519AFour-wheel traveling system for tipperKOMATSU MFG CO LTD·Filed 1993·Granted Oct 15, 1996·47 cites·10 claims
- 0376US8552574B2Cogeneration apparatusSASAKI NOBUYUKI·Filed 2012·Granted Oct 8, 2013·7 cites·4 claims
- 0473US7394483B2Display evaluation method and apparatusOTSUKA DENSHI KK·Filed 2005·Granted Jul 1, 2008·7 cites·7 claims
- 0567US7483550B2Method and system for evaluating moving image quality of displaysOTSUKA DENSHI KK·Filed 2004·Granted Jan 27, 2009·11 cites·8 claims
- 0665US5015094AParticle size measuring systemOTSUKA DENSHI KK·Filed 1989·Granted May 14, 1991·28 cites·3 claims
- 0761US7847819B2Measurement system for evaluating moving image quality of displaysOTSUKA DENSHI KK·Filed 2003·Granted Dec 7, 2010·4 cites·11 claims
- 0861US7251035B2Optical cell measurement apparatusOTSUKA DENSHI KK·Filed 2005·Granted Jul 31, 2007·1 cites·4 claims
- 0960US8794169B2Power steering apparatus for small vesselHARADA YOSHIHIRO·Filed 2010·Granted Aug 5, 2014·2 cites·16 claims
- 1060US5183045ANmr measuring method and measuring apparatus for tissue of a living bodyOTSUKA ELECTRONIC CO LTD·Filed 1989·Granted Feb 2, 1993·23 cites·12 claims
- 1158US8393925B2Steering device for outboard engineHARADA YOSHIHIRO·Filed 2010·Granted Mar 12, 2013·1 cites·3 claims
- 1257US8388392B2Steering device for outboard engineHARADA YOSHIHIRO·Filed 2010·Granted Mar 5, 2013·1 cites·7 claims
- 1355US5157454ADifferential refractometerOTSUKA DENSHI KK·Filed 1990·Granted Oct 20, 1992·23 cites·15 claims
- 1452US4664723ASamarium-cobalt type magnet powder for resin magnetSUMITOMO METAL MINING CO·Filed 1985·Granted May 12, 1987·9 cites·9 claims
- 1548US9413206B2Cogeneration apparatusHONDA MOTOR CO LTD·Filed 2013·Granted Aug 9, 2016·0 cites·8 claims
- 1647US4553734AFinger pressure actuable dump control system for dump vehiclesKOMATSU MFG CO LTD·Filed 1983·Granted Nov 19, 1985·12 cites·3 claims
- 1744US6636308B1Apparatus for measuring characteristics of optical angleOTSUKA DENSHI KK·Filed 1998·Granted Oct 21, 2003·13 cites·7 claims
- 1842US4689073AMethod for production of rare-earth element/cobalt type magnetic powder for resin magnetSUMITOMO METAL MINING CO·Filed 1986·Granted Aug 25, 1987·7 cites·9 claims
- 1938US4865660ARare-earth element/cobalt type magnet powder for resin magnetsSUMITOMO METAL MINING CO·Filed 1988·Granted Sep 12, 1989·6 cites·2 claims
- 2036US2006160436A1System and method for measuring/evaluating moving image quality of screenOKA KOICHI·Filed 2003·Application pending·0 cites
- 2135US8893472B2Cogeneration apparatusOKA KOICHI·Filed 2012·Granted Nov 25, 2014·0 cites·5 claims
- 2234US2007193897A1Disk storage case and recording mediumKINOSHITA TAKASHI·Filed 2005·Application pending·0 cites
- 2334US2006279633A1Method of evaluating motion picture display performance, inspection screen and system for evaluating motion picture display performanceOKA KOICHI·Filed 2006·Application pending·0 cites
- 2433US5337474AProcess for fabricating electronic devices and image sensorFUJI XEROX CO LTD·Filed 1992·Granted Aug 16, 1994·4 cites·12 claims
- 2528US5113083ALight scattering measuring apparatus utilizing a photodetector mounted on a rotary standOTSUKA DENSHI KK·Filed 1989·Granted May 12, 1992·4 cites·11 claims
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