Inventor · disambiguated record
Hirofumi Tsuchida
Also filed as: TSUCHIDA HIROFUMI
65 granted patents·3 pending applications·1,151 citations·filing 1986–2021
99Inventor score
Top patents by PatentIndex Score
68 records- 0197US7801439B2Image taking device having a detachable optical unit, an attachment and displacement detection unit, and a control unit responsive to attachment and displacement detectionOLYMPUS CORP·Filed 2007·Granted Sep 21, 2010·75 cites·5 claims
- 0297US7604423B2Interchangeable-lens cameraOLYMPUS CORP·Filed 2007·Granted Oct 20, 2009·50 cites·9 claims
- 0395US6289673B1Air-fuel ratio control for exhaust gas purification of engineNISSAN MOTOR·Filed 1999·Granted Sep 18, 2001·84 cites·20 claims
- 0494US6070567AIndividual cylinder combustion state detection from engine crankshaft accelerationNISSAN MOTOR·Filed 1997·Granted Jun 6, 2000·62 cites·25 claims
- 0590US6516612B1Exhaust gas purification device for an engine and A/F ratio control for early activating a NOx trapping catalystNISSAN MOTOR·Filed 2000·Granted Feb 11, 2003·59 cites·26 claims
- 0688US6845610B2Exhaust gas purification apparatus and methodNISSAN MOTOR·Filed 2001·Granted Jan 25, 2005·48 cites·13 claims
- 0788US6314724B1Air-fuel ratio controller and method of controlling air-fuel ratioNISSAN MOTOR·Filed 2000·Granted Nov 13, 2001·37 cites·20 claims
- 0888US4999007AVari-focal lens systemOLYMPUS OPTICAL CO·Filed 1989·Granted Mar 12, 1991·72 cites·16 claims
- 0987US6559439B1Image taking lens unit with frame member for positioning lens and substrateOLYMPUS OPTICAL CO·Filed 1999·Granted May 6, 2003·87 cites·29 claims
- 1086US7334547B2Variable expansion-ratio engineNISSAN MOTOR·Filed 2007·Granted Feb 26, 2008·15 cites·14 claims
- 1184US5157550AVari-focal lens systemOLYMPUS OPTICAL CO·Filed 1990·Granted Oct 20, 1992·61 cites·51 claims
- 1281US6282889B1Air/fuel ration control system of internal combustion engineNISSAN MOTOR·Filed 2000·Granted Sep 4, 2001·23 cites·4 claims
- 1379US10465622B2Engine control method and control deviceNISSAN MOTOR·Filed 2016·Granted Nov 5, 2019·2 cites·10 claims
- 1478US6814046B1Direct fuel injection engineNISSAN MOTOR·Filed 2004·Granted Nov 9, 2004·21 cites·23 claims
- 1577US6912989B2Fuel injection control device for a direct fuel injection engineNISSAN MOTOR·Filed 2004·Granted Jul 5, 2005·21 cites·28 claims
- 1676US6362925B1Lens group zoom lens system, and display device having phototaking functionOLYMPUS OPTICAL CO·Filed 2000·Granted Mar 26, 2002·17 cites·30 claims
- 1775US8100097B2Multi-link engineTAKAHASHI NAOKI·Filed 2008·Granted Jan 24, 2012·6 cites·8 claims
- 1873US10890126B2Method for controlling internal combustion engine and device for controlling internal combustion engineNISSAN MOTOR·Filed 2017·Granted Jan 12, 2021·1 cites·11 claims
- 1973US4833373ASystem for shaking water off windshieldNISSAN MOTOR·Filed 1987·Granted May 23, 1989·35 cites·8 claims
- 2072US5870229AGradient index lens component and image pickup apparatus using the gradient index lens componentOLYMPUS OPTICAL CO·Filed 1996·Granted Feb 9, 1999·33 cites·4 claims
- 2171US6477833B2Engine exhaust emission controlNISSAN MOTOR·Filed 2001·Granted Nov 12, 2002·20 cites·9 claims
- 2269US8627789B2Control apparatus for a cylinder direct-injection internal combustion engineHIRAYA KOJI·Filed 2009·Granted Jan 14, 2014·8 cites·20 claims
- 2368US7980207B2Multi-link engineNISSAN MOTOR·Filed 2008·Granted Jul 19, 2011·4 cites·7 claims
- 2467US5046833AZoom lens systemOLYMPUS OPTICAL CO·Filed 1989·Granted Sep 10, 1991·24 cites·7 claims
- 2566US5184251AVari-focal lens systemOLYMPUS OPTICAL CO·Filed 1991·Granted Feb 2, 1993·27 cites·8 claims
- 2663US7188589B2Direct injection internal combustion engineNISSAN MOTOR·Filed 2005·Granted Mar 13, 2007·6 cites·7 claims
- 2762US12055108B2Control method and control device for internal combustion engineNISSAN MOTOR·Filed 2021·Granted Aug 6, 2024·0 cites·6 claims
- 2862US9964055B2Control device and control method of internal combustion engineNISSAN MOTOR·Filed 2013·Granted May 8, 2018·2 cites·12 claims
- 2961US6381954B1Air/fuel ratio control system of internal combustion engineNISSAN MOTOR·Filed 2001·Granted May 7, 2002·10 cites·1 claims
- 3061US6359738B1Two-group zoom lens system and display device having phototaking functionOLYMPUS OPTICAL CO·Filed 2000·Granted Mar 19, 2002·7 cites·22 claims
- 3160US8100098B2Multi-link engineTAKAHASHI NAOKI·Filed 2008·Granted Jan 24, 2012·2 cites·11 claims
- 3258US6327096B1Set of lens systemOLYMPUS OPTICAL CO·Filed 1998·Granted Dec 4, 2001·20 cites·17 claims
- 3357US7121087B2Exhaust emission control device of internal combustion engineNISSAN MOTOR·Filed 2001·Granted Oct 17, 2006·8 cites·13 claims
- 3457US4828383ARange-finding optical systemOLYMPUS OPTICAL CO·Filed 1986·Granted May 9, 1989·19 cites·5 claims
- 3555US11939928B2EGR control method and EGR controllerNISSAN MOTOR·Filed 2019·Granted Mar 26, 2024·0 cites·8 claims
- 3655US7475675B2In-cylinder direct fuel-injection engineNISSAN MOTOR·Filed 2006·Granted Jan 13, 2009·2 cites·14 claims
- 3755US6220017B1Exhaust emission control system for internal combustion engineNISSAN MOTOR·Filed 1999·Granted Apr 24, 2001·20 cites·9 claims
- 3853US7028662B2Direct fuel injection engineNISSAN MOTOR·Filed 2004·Granted Apr 18, 2006·6 cites·15 claims
- 3953US6831791B2Optical system for optical communications and method of manufacturing the sameOLYMPUS CORP·Filed 2003·Granted Dec 14, 2004·3 cites·16 claims
- 4053US4947198AFinder optical system for single reflex camerasOLYMPUS OPTICAL CO·Filed 1989·Granted Aug 7, 1990·17 cites·14 claims
- 4152US4875444ASwirl chamber for diesel engines and the likeNISSAN MOTOR·Filed 1988·Granted Oct 24, 1989·12 cites·8 claims
- 4251US6870692B2Wide angle lens systemOLYMPUS CORP·Filed 2003·Granted Mar 22, 2005·2 cites·15 claims
- 4351US6104545AGradient index lens component and image pickup apparatus using the gradient index lensOLYMPUS OPTICAL CO·Filed 1998·Granted Aug 15, 2000·12 cites·25 claims
- 4449US9970368B2EGR control device and EGR control methodNISSAN MOTOR·Filed 2014·Granted May 15, 2018·0 cites·11 claims
- 4548US5268791ALens system using graded refractive index lens componentOLYMPUS OPTICAL CO·Filed 1992·Granted Dec 7, 1993·13 cites·5 claims
- 4647US11441497B2Internal combustion engine control method and internal combustion engine control deviceNISSAN MOTOR·Filed 2018·Granted Sep 13, 2022·0 cites·3 claims
- 4747US10100759B2Exhaust gas recirculation control device and exhaust gas recirculation control methodNISSAN MOTOR·Filed 2014·Granted Oct 16, 2018·0 cites·3 claims
- 4847US9759165B2Internal combustion engineNISSAN MOTOR·Filed 2013·Granted Sep 12, 2017·0 cites·4 claims
- 4946US7086378B2Direct fuel injection internal combustion engineNISSAN MOTOR·Filed 2004·Granted Aug 8, 2006·3 cites·16 claims
- 5046US6497846B1Exhaust gas purifying system for internal combustion engineNISSAN MOTOR·Filed 1999·Granted Dec 24, 2002·10 cites·6 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 →