Inventor · disambiguated record
Kenji Umayahara
Also filed as: UMAYAHARA KENJI
64 granted patents·3 pending applications·156 citations·filing 1997–2020
98Inventor score
Top patents by PatentIndex Score
67 records- 0187US7648787B2Gas leak detection device and fuel cell systemTOYOTA MOTOR CO LTD·Filed 2005·Granted Jan 19, 2010·9 cites·13 claims
- 0287US6851298B2Fluid leakage detection apparatus and fluid leakage detection methodTOYOTA MOTOR CO LTD·Filed 2003·Granted Feb 8, 2005·40 cites·19 claims
- 0386US9776526B2Fuel cell system, fuel cell vehicle, and method of controlling fuel cell systemTOYOTA MOTOR CO LTD·Filed 2015·Granted Oct 3, 2017·2 cites·14 claims
- 0486US8153315B2Fuel cell system having output voltage correctorIMAI ATSUSHI·Filed 2008·Granted Apr 10, 2012·6 cites·14 claims
- 0585US10497995B2Fuel cell system and control method of the sameTOYOTA MOTOR CO LTD·Filed 2017·Granted Dec 3, 2019·2 cites·10 claims
- 0684US9884567B2Vehicle including fuel cell systemTOYOTA MOTOR CO LTD·Filed 2015·Granted Feb 6, 2018·2 cites·7 claims
- 0783US10291054B2Fuel cell systemTOYOTA MOTOR CO LTD·Filed 2017·Granted May 14, 2019·4 cites·20 claims
- 0882US10128523B2Fuel cell system and control method for the sameTOYOTA MOTOR CO LTD·Filed 2017·Granted Nov 13, 2018·1 cites·7 claims
- 0982US9034495B2Fuel cell systemUMAYAHARA KENJI·Filed 2008·Granted May 19, 2015·6 cites·4 claims
- 1081US8642224B2Fuel cell system with a learning capability to readjust the driving characteristic of a gas supply device and vehicleUMAYAHARA KENJI·Filed 2006·Granted Feb 4, 2014·4 cites·12 claims
- 1181US8084151B2Fuel cell system and method thereforUMAYAHARA KENJI·Filed 2008·Granted Dec 27, 2011·4 cites·14 claims
- 1280US8277990B2Fuel cell systemUMAYAHARA KENJI·Filed 2006·Granted Oct 2, 2012·5 cites·11 claims
- 1379US8853989B2Fuel cell system and motor driving methodUMAYAHARA KENJI·Filed 2009·Granted Oct 7, 2014·4 cites·14 claims
- 1479US7438146B2Moving object mounting fuel cellTOYOTA MOTOR CO LTD·Filed 2005·Granted Oct 21, 2008·4 cites·8 claims
- 1577US10118493B2System and method for controlling regenerative braking force of a vehicleTOYOTA MOTOR CO LTD·Filed 2015·Granted Nov 6, 2018·4 cites·6 claims
- 1676US9758169B2Vehicle employing ordinary and deceleration enhanced drive modes in an accelerator-off stateTOYOTA MOTOR CO LTD·Filed 2015·Granted Sep 12, 2017·3 cites·8 claims
- 1775US10103394B2Fuel cell system programmed for improved air compressor controlTOYOTA MOTOR CO LTD·Filed 2015·Granted Oct 16, 2018·1 cites·7 claims
- 1875US8329351B2Fuel cell systemYOSHIDA MICHIO·Filed 2008·Granted Dec 11, 2012·3 cites·5 claims
- 1973US10115990B2Fuel cell system, fuel cell vehicle, and method for controlling fuel cell systemTOYOTA MOTOR CO LTD·Filed 2015·Granted Oct 30, 2018·1 cites·6 claims
- 2072US8999591B2Fuel cell system for preventing excessive power generationUMAYAHARA KENJI·Filed 2008·Granted Apr 7, 2015·2 cites·2 claims
- 2172US8996182B2Fuel cell system and power control method thereforMORI HIROAKI·Filed 2009·Granted Mar 31, 2015·2 cites·5 claims
- 2272US8445153B2Fuel cell high-potential prevention control systemYOSHIDA MICHIO·Filed 2008·Granted May 21, 2013·2 cites·3 claims
- 2370US8658324B2Fuel cell systemUMAYAHARA KENJI·Filed 2009·Granted Feb 25, 2014·1 cites·2 claims
- 2469US9853313B2Fuel cell system, control method for the fuel cell system, and electric vehicle equipped with the fuel cell systemYOSHIDA MICHIO·Filed 2010·Granted Dec 26, 2017·1 cites·3 claims
- 2569US8802310B2Fuel cell systemUMAYAHARA KENJI·Filed 2012·Granted Aug 12, 2014·1 cites·1 claims
- 2668US8722265B2Fuel cell systemUMAYAHARA KENJI·Filed 2008·Granted May 13, 2014·1 cites·5 claims
- 2767US10099557B2Vehicle driven by motor and control method of charging and discharging of secondary battery provided in vehicleTOYOTA MOTOR CO LTD·Filed 2015·Granted Oct 16, 2018·2 cites·10 claims
- 2867US9821662B2Braking force control system, vehicle and method of controlling braking forceTOYOTA MOTOR CO LTD·Filed 2015·Granted Nov 21, 2017·2 cites·6 claims
- 2967US7608354B2Fuel cell system and control method of sameTOYOTA MOTOR CO LTD·Filed 2005·Granted Oct 27, 2009·1 cites·19 claims
- 3066US11342568B2Fuel cell vehicle and method using fuel cell vehicleTOYOTA MOTOR CO LTD·Filed 2019·Granted May 24, 2022·1 cites·6 claims
- 3165US11152632B2Fuel cell system and control methodTOYOTA MOTOR CO LTD·Filed 2020·Granted Oct 19, 2021·0 cites·10 claims
- 3264US9873351B2Fuel cell system, fuel cell vehicle, and method of controlling fuel cell systemTOYOTA MOTOR CO LTD·Filed 2017·Granted Jan 23, 2018·0 cites·7 claims
- 3363US9796294B2Vehicle driven by electric motor and control method for vehicleTOYOTA MOTOR CO LTD·Filed 2015·Granted Oct 24, 2017·1 cites·5 claims
- 3463US8130108B2Gas level display controller, gas level display device, and gas level display control methodUMAYAHARA KENJI·Filed 2008·Granted Mar 6, 2012·1 cites·5 claims
- 3562US8273490B2Fuel cell systemUMAYAHARA KENJI·Filed 2008·Granted Sep 25, 2012·7 cites·7 claims
- 3662US8153314B2Alert method relating to remaining fuel amount of fuel cell system and fuel cell system using the sameUMAYAHARA KENJI·Filed 2003·Granted Apr 10, 2012·5 cites·13 claims
- 3760US11489182B2Fuel cell systemTOYOTA MOTOR CO LTD·Filed 2020·Granted Nov 1, 2022·0 cites·3 claims
- 3859US9889763B2External power supply of fuel cell mounted vehicle and control method thereforTOYOTA MOTOR CO LTD·Filed 2015·Granted Feb 13, 2018·1 cites·8 claims
- 3958US10056626B2Fuel cell system, fuel cell vehicle, and control method for fuel cell systemTOYOTA MOTOR CO LTD·Filed 2015·Granted Aug 21, 2018·1 cites·6 claims
- 4058US2012146421A1Fuel cell systemUMAYAHARA KENJI·Filed 2009·Application pending·0 cites
- 4158US2010092819A1Fuel cell systemUMAYAHARA KENJI·Filed 2008·Application pending·0 cites
- 4257US11367884B2Hydrogen supply system, train and hydrogen supply methodTOYOTA MOTOR CO LTD·Filed 2019·Granted Jun 21, 2022·0 cites·7 claims
- 4357US8795913B2Fuel cell system and control method thereofMORI HIROAKI·Filed 2009·Granted Aug 5, 2014·0 cites·9 claims
- 4456US8728677B2Fuel cell system and fuel cell degradation judgment methodYOSHIDA MICHIO·Filed 2008·Granted May 20, 2014·0 cites·7 claims
- 4556US8277993B2Fuel cell systemYOSHIDA MICHIO·Filed 2008·Granted Oct 2, 2012·0 cites·3 claims
- 4655US8980487B2Fuel cell system and activating completion degree displaying method of the sameUMAYAHARA KENJI·Filed 2008·Granted Mar 17, 2015·0 cites·6 claims
- 4754US9905869B2Fuel cell system and method of controlling the sameUMAYAHARA KENJI·Filed 2008·Granted Feb 27, 2018·0 cites·6 claims
- 4854US8722266B2Fuel cell systemUMAYAHARA KENJI·Filed 2008·Granted May 13, 2014·0 cites·4 claims
- 4953US11018357B2Fuel cell system and method of controlling fuel cellTOYOTA MOTOR CO LTD·Filed 2019·Granted May 25, 2021·0 cites·5 claims
- 5053US8609292B2Fuel cell systemUMAYAHARA KENJI·Filed 2007·Granted Dec 17, 2013·0 cites·8 claims
Showing the top 50 of 67 patent records by PatentIndex Score.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →