Inventor · disambiguated record
Shigeo Ohkuma
Also filed as: OHKUMA SHIGEO
31 granted patents·4 pending applications·482 citations·filing 1994–2016
97Inventor score
Top patents by PatentIndex Score
35 records- 0192US6182642B1Leak detection of emission control systemUNISIA JECS CORP·Filed 1999·Granted Feb 6, 2001·62 cites·16 claims
- 0289US6321728B1Apparatus and method for diagnosing faults of fuel vapor treatment unitUNISIA JECS CORP·Filed 2000·Granted Nov 27, 2001·32 cites·23 claims
- 0389US5850458AApparatus and method for actively reducing noise in vehicular passengers compartmentUNISIA JECS CORP·Filed 1995·Granted Dec 15, 1998·87 cites·33 claims
- 0487US6644017B2Device for and method of controlling air-fuel ratio of internal combustion engineUNISIA JECS CORP·Filed 2001·Granted Nov 11, 2003·34 cites·16 claims
- 0587US6389882B1Apparatus and method for diagnosing leakage in fuel vapor treatment apparatusUNISIA JECS CORP·Filed 2000·Granted May 21, 2002·28 cites·13 claims
- 0686US6453229B1Air-fuel ratio control device for internal combustion engine and method thereofUNISIA JECS CORP·Filed 2000·Granted Sep 17, 2002·32 cites·35 claims
- 0784US10093193B2Charging systemNICHICON CORP·Filed 2016·Granted Oct 9, 2018·10 cites·14 claims
- 0884US5517073APressure sensorUNISIA JECS CORP·Filed 1994·Granted May 14, 1996·45 cites·21 claims
- 0982US10040364B2Charging apparatusNICHICON CORP·Filed 2016·Granted Aug 7, 2018·4 cites·13 claims
- 1080US7017567B2Device and method for measuring element temperature of air-fuel ratio sensor, and device and method for controlling heater of air-fuel ratio sensorHITACHI LTD·Filed 2004·Granted Mar 28, 2006·14 cites·19 claims
- 1180US6848439B2Air-fuel ratio control apparatus, air-fuel ratio detecting apparatus and methods thereof for engineHITACHI UNISIA AUTOMOTIVE LTD·Filed 2002·Granted Feb 1, 2005·24 cites·24 claims
- 1276US7836758B2Deterioration diagnosis system for an air-fuel ratio sensorHITACHI LTD·Filed 2007·Granted Nov 23, 2010·13 cites·8 claims
- 1374US8994329B2Stationary charging systemNICHICON CORP·Filed 2012·Granted Mar 31, 2015·5 cites·5 claims
- 1473US6712054B2Device and method for measuring element temperature of air-fuel ratio sensor, and device and method for controlling heater of air-fuel ratio sensorUNISIA JECS CORP·Filed 2001·Granted Mar 30, 2004·9 cites·9 claims
- 1570US6576118B2Correction device of air-fuel ratio detection apparatusUNISIA JECS CORP·Filed 2001·Granted Jun 10, 2003·8 cites·12 claims
- 1668US9007022B2Stationary charging systemNICHICON CORP·Filed 2012·Granted Apr 14, 2015·4 cites·7 claims
- 1766US6571602B2Apparatus and method for detecting catalyst temperatureUNISIA JECS CORP·Filed 2001·Granted Jun 3, 2003·20 cites·19 claims
- 1863US6450158B2Air-fuel ratio feedback control apparatus of internal combustion engine and method thereofUNISIA JECS CORP·Filed 2001·Granted Sep 17, 2002·12 cites·18 claims
- 1953US6918385B2Air-fuel ratio detecting apparatus of engine and method thereofHITACHI LTD·Filed 2002·Granted Jul 19, 2005·8 cites·19 claims
- 2049US6769422B2Apparatus and method for controlling air-fuel ratio of engineUNISIA JECS CORP·Filed 2002·Granted Aug 3, 2004·6 cites·17 claims
- 2149US2005139491A1Oxygen concentration detecting apparatus and methodHITACHI LTD·Filed 2004·Application pending·0 cites
- 2247US6973926B2Air-fuel ratio control apparatus for internal combustion engine and method thereofHITACHI LTD·Filed 2004·Granted Dec 13, 2005·5 cites·20 claims
- 2346US9124117B2Charging deviceNICHICON CORP·Filed 2012·Granted Sep 1, 2015·0 cites·3 claims
- 2444US6453895B2Feedback control device and feedback control method of air-fuel ratio in internal combustion engineUNISIA JECS CORP·Filed 2001·Granted Sep 24, 2002·4 cites·20 claims
- 2543US2005021214A1Exhaust component concentration detecting apparatus for internal combustion engine and heating method of exhaust component concentration detectorHITACHI UNISIA AUTOMOTIVE LTD·Filed 2004·Application pending·0 cites
- 2641US6176217B1Fuel vapor processing apparatus and method of internal combustion engineUNISIA JECS CORP·Filed 1999·Granted Jan 23, 2001·9 cites·12 claims
- 2740US2002062640A1Device and method for controlling air-fuel ratio of internal combustion engineUNISIA JECS CORP·Filed 2001·Application pending·0 cites
- 2839US10343539B2Power supply device for supplying electricity to a load utilizing electric power of a storage-battery-equipped vehicleNICHICON CORP·Filed 2016·Granted Jul 9, 2019·0 cites·4 claims
- 2938US7146972B2Exhaust gas sensor activation judgment and air fuel ratio control system/methodHITACHI LTD·Filed 2005·Granted Dec 12, 2006·0 cites·14 claims
- 3038US6976483B2Air-fuel ratio control apparatus for internal combustion engine and method thereofHITACHI LTD·Filed 2004·Granted Dec 20, 2005·2 cites·21 claims
- 3138US6450159B2Fuel vapor treatment apparatus in internal combustion engine and method thereofUNISIA JECS CORP·Filed 2001·Granted Sep 17, 2002·2 cites·19 claims
- 3238US2009157282A1Air-Fuel Ratio Control Apparatus by Sliding Mode Control of EngineHITACHI LTD·Filed 2008·Application pending·0 cites
- 3334US6723965B2Heater control apparatus of air-fuel ratio sensor and method thereofUNISIA JECS CORP·Filed 2001·Granted Apr 20, 2004·3 cites·29 claims
- 3433US6609510B2Device and method for controlling air-fuel ratio of internal combustion engineUNISIA JECS CORP·Filed 2001·Granted Aug 26, 2003·0 cites·15 claims
- 3533US6453896B2Air-fuel ratio feedback control apparatus and method of internal combustion engineUNISIA JECS CORP·Filed 2001·Granted Sep 24, 2002·0 cites·15 claims
Join the waitlist — get patent alerts
Get an alert when Shigeo Ohkuma 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 →