Inventor · disambiguated record
Masato Kumagai
Also filed as: KUMAGAI MASATO
34 granted patents·6 pending applications·591 citations·filing 1987–2013
98Inventor score
Files withUNISIA JECS CORP14HITACHI LTD8KAWASAKI STEEL CO8HITACHI UNISIA AUTOMOTIVE LTD5MIZUSHIMA FERROALLOY CO LTD2
Top patents by PatentIndex Score
40 records- 0186US5993974APorcelain-enameled steel sheets and frits for enamelingKAWASAKI STEEL CO·Filed 1998·Granted Nov 30, 1999·69 cites·15 claims
- 0286US5979405AApparatus for controlling a throttle valve electronically in an internal combustion engineUNISIA JECS CORP·Filed 1998·Granted Nov 9, 1999·41 cites·12 claims
- 0385US5467751AThrottle valve control systemUNISIA JECS CORP·Filed 1994·Granted Nov 21, 1995·40 cites·5 claims
- 0483US5823165AValve actuator arrangement for internal combustion engineUNISIA JECS CORP·Filed 1997·Granted Oct 20, 1998·43 cites·23 claims
- 0579US7716438B2Storage system and back-up method for storage systemHITACHI LTD·Filed 2007·Granted May 11, 2010·10 cites·14 claims
- 0679US6805106B2Fuel-injection systemUNISIA JECS CORP·Filed 2002·Granted Oct 19, 2004·19 cites·8 claims
- 0778US6516776B1Throttle valve device of engineUNISIA JECS CORP·Filed 2000·Granted Feb 11, 2003·21 cites·20 claims
- 0875US7370816B2Fuel injectorHITACHI LTD·Filed 2006·Granted May 13, 2008·7 cites·18 claims
- 0975US7272693B2Storage system and back-up method for storage systemHITACHI LTD·Filed 2004·Granted Sep 18, 2007·22 cites·13 claims
- 1075US6332451B1Rotary valve actuator arrangementUNISIA JECS CORP·Filed 2000·Granted Dec 25, 2001·20 cites·42 claims
- 1175US4780299AMethod for producing aluminum nitride powderKAWASAKI STEEL CO·Filed 1987·Granted Oct 25, 1988·23 cites·10 claims
- 1274US6039027AThrottle valve deviceUNISIA JECS CORP·Filed 1998·Granted Mar 21, 2000·35 cites·11 claims
- 1374US5423299AControl valve opening control apparatusUNISIA JECS CORP·Filed 1993·Granted Jun 13, 1995·26 cites·12 claims
- 1472US6334885B1Method of solidifying steel-making slag and material produced by the methodKAWASAKI STEEL CO·Filed 1999·Granted Jan 1, 2002·29 cites·10 claims
- 1567US7213584B2Fuel supply apparatus and control method for internal combustion engineHITACHI LTD·Filed 2004·Granted May 8, 2007·14 cites·15 claims
- 1667US6915690B2Fuel gaugeHITACHI UNISIA AUTOMOTIVE LTD·Filed 2004·Granted Jul 12, 2005·13 cites·9 claims
- 1767US6792923B2Fuel supply system for vehicleHITACHI UNISIA AUTOMOTIVE LTD·Filed 2003·Granted Sep 21, 2004·11 cites·15 claims
- 1866US6288001B1Graphite-containing monolithic refractory materialKAWASAKI STEEL CO·Filed 1998·Granted Sep 11, 2001·14 cites·16 claims
- 1966US6109240AApparatus for controlling a throttle valve electronically in an internal combustion engineUNISIA JECS CORP·Filed 1998·Granted Aug 29, 2000·24 cites·5 claims
- 2066US5204300AMethods of seeding sintered objectsKAWASAKI STEEL CO·Filed 1989·Granted Apr 20, 1993·19 cites·7 claims
- 2159US6732547B1Method for the treating stainless steel refining slagJFE STEEL CORP·Filed 2000·Granted May 11, 2004·2 cites·20 claims
- 2257US9433565B2Hydrophilic and highly oil absorbent boron nitride powder, method for manufacturing the same, and cosmeticMIZUSHIMA FERROALLOY CO LTD·Filed 2013·Granted Sep 6, 2016·0 cites·8 claims
- 2356US5462026AThrottle valve assembly with traction control deviceUNISIA JECS CORP·Filed 1994·Granted Oct 31, 1995·14 cites·14 claims
- 2454US6843235B2Fuel supply unitHITACHI UNISIA AUTOMOTIVE LTD·Filed 2003·Granted Jan 18, 2005·5 cites·28 claims
- 2553USRE40382EApparatus for controlling a throttle valve electronically in an internal combustion engineHITACHI LTD·Filed 2006·Granted Jun 17, 2008·2 cites·70 claims
- 2651US7013728B2System for detecting level of liquid in tankHITACHI LTD·Filed 2004·Granted Mar 21, 2006·5 cites·5 claims
- 2751US6521040B2Method for processing chromium oxide-containing substances in large quantities, method for utilizing the processed substances, and products comprising the processed substancesKAWASAKI STEEL CO·Filed 2001·Granted Feb 18, 2003·3 cites·3 claims
- 2851US6322622B1Flame-spraying powdery repair mixtureKAWASAKI STEEL CO·Filed 1998·Granted Nov 27, 2001·6 cites·6 claims
- 2951US6000377AApparatus for controlling a throttle valve electronically in an internal combustion engineUNISIA JECS CORP·Filed 1998·Granted Dec 14, 1999·14 cites·11 claims
- 3050US5907971ADevice for returning reciprocating mechanism to predetermined positionUNISIA JECS CORP·Filed 1998·Granted Jun 1, 1999·14 cites·6 claims
- 3147US2017151135A9Highly water repellent and highly oil absorbent boron nitride powder, method for manufacturing the same, and cosmeticMIZUSHIMA FERROALLOY CO LTD·Filed 2013·Application pending·0 cites
- 3243US6032647AThrottle valve control deviceUNISIA JECS CORP·Filed 1998·Granted Mar 7, 2000·11 cites·15 claims
- 3342US5964203AThrottle valve device of internal combustion engineUNISIA JECS CORP·Filed 1998·Granted Oct 12, 1999·10 cites·8 claims
- 3441US2005281684A1Fuel supply apparatusHITACHI LTD·Filed 2005·Application pending·0 cites
- 3540US2013279114A1Vehicular Power Conversion ApparatusNISHIKIMI FUSANORI·Filed 2011·Application pending·0 cites
- 3639US9189985B2Mobile information terminalKOURA YUUSUKE·Filed 2006·Granted Nov 17, 2015·0 cites·10 claims
- 3739US6336967B1Method for processing chromium oxide-containing substances in large quantities, method for utilizing the processed substances, and products comprising the processed substancesKAWASAKI STEEL CO·Filed 1998·Granted Jan 8, 2002·5 cites·6 claims
- 3839US2003197143A1Solenoid valveHITACHI UNISIA AUTOMOTIVE LTD·Filed 2003·Application pending·0 cites
- 3939US2007228192A1Fuel injector and production methodHITACHI LTD·Filed 2007·Application pending·0 cites
- 4039US2004231416A1Fuel gaugeHITACHI UNISIA AUTOMOTIVE LTD·Filed 2004·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →