Inventor · disambiguated record
Takefumi Okumura
Also filed as: OKUMURA TAKEFUMI
17 granted patents·17 pending applications·83 citations·filing 2001–2019
91Inventor score
Top patents by PatentIndex Score
34 records- 0194US7862933B2Lithium secondary batteryHITACHI VEHICLE ENERGY LTD·Filed 2008·Granted Jan 4, 2011·29 cites·8 claims
- 0290US8581555B2Secondary battery system including an arrangement to determine a temporary increase in direct current resistance of the secondary batteryYAMAMOTO TSUNENORI·Filed 2011·Granted Nov 12, 2013·7 cites·10 claims
- 0382US7300991B2Cationic conductor, its intermediate, and lithium secondary battery using the conductorHITACHI LTD·Filed 2003·Granted Nov 27, 2007·23 cites·16 claims
- 0480US9118087B2Electrode for lithium secondary batteryABE TOSHIO·Filed 2011·Granted Aug 25, 2015·5 cites·19 claims
- 0578US9306214B2Lithium ion batteryHITACHI CHEMICAL CO LTD·Filed 2013·Granted Apr 5, 2016·3 cites·4 claims
- 0678US8828584B2Lithium-ion rechargeable battery module, vehicle with the battery module and generating system with the battery moduleGUNJI AKIRA·Filed 2012·Granted Sep 9, 2014·3 cites·13 claims
- 0777US8742728B2System for controlling charging and discharging of lithium ion batterySASAKI HIRONORI·Filed 2011·Granted Jun 3, 2014·2 cites·6 claims
- 0873US7230057B2Boron-containing compound, ion-conductive polymer and polyelectrolyte for electrochemical devicesNOF CORP·Filed 2003·Granted Jun 12, 2007·8 cites·10 claims
- 0969US8263269B2Lithium secondary batteryOKUMURA TAKEFUMI·Filed 2010·Granted Sep 11, 2012·1 cites·34 claims
- 1060US7704642B2Cationic conductor, its intermediate, and lithium secondary battery using the conductorHITACHI LTD·Filed 2007·Granted Apr 27, 2010·0 cites·16 claims
- 1155US7473492B2Lithium secondary batteryHITACHI LTD·Filed 2003·Granted Jan 6, 2009·2 cites·16 claims
- 1254US7923580B2Polymerizable boric compounds, methods of producing the same, polymerizable compositions and ionic-conductive polymeric electrolytesHITACHI LTD·Filed 2010·Granted Apr 12, 2011·0 cites·19 claims
- 1354US7759003B2Polymerizable boric compounds, methods of producing the same, polymerizable compositions and ionic-conductive polymeric electrolytesHITACHI LTD·Filed 2005·Granted Jul 20, 2010·0 cites·10 claims
- 1453US2016006077A1Lithium Ion BatterySHIN KOBE ELECTRIC MACHINERY·Filed 2015·Application pending·0 cites
- 1552US2014322576A1Lithium Ion BatteryOKUMURA TAKEFUMI·Filed 2012·Application pending·0 cites
- 1651US8642217B2Lithium secondary batteryOKUMURA TAKEFUMI·Filed 2011·Granted Feb 4, 2014·0 cites·5 claims
- 1751US2009325041A1Lithium Secondary BatteryHITACHI LTD·Filed 2009·Application pending·0 cites
- 1849US9406929B2Lithium ion batteryKIMURA TAKAYUKI·Filed 2012·Granted Aug 2, 2016·0 cites·4 claims
- 1948US2007048618A1Electrochemical devicesOKUMURA TAKEFUMI·Filed 2006·Application pending·0 cites
- 2047US8541118B2Lithium-ion battery and method for regenerating the sameOKUMURA TAKEFUMI·Filed 2011·Granted Sep 24, 2013·0 cites·6 claims
- 2146US8409757B2Lithium secondary batteryOKUMURA TAKEFUMI·Filed 2010·Granted Apr 2, 2013·0 cites·3 claims
- 2246US2020411900A1Insulation layer, battery cell sheet, and batteryHITACHI LTD·Filed 2019·Application pending·0 cites
- 2345US2012321950A1Lithium ion secondary batteryOKUMURA TAKEFUMI·Filed 2012·Application pending·0 cites
- 2445US2014363708A1Lithium Ion BatteryITO SHINGO·Filed 2012·Application pending·0 cites
- 2544US2004101758A1Lithium secondary batteryFiled 2003·Application pending·0 cites
- 2644US2014370346A1Lithium Ion BatteryOKUMURA TAKEFUMI·Filed 2012·Application pending·0 cites
- 2744US2011183213A1Lithium ion batteryHITACHI LTD·Filed 2011·Application pending·0 cites
- 2844US2007048616A1Gel electrolyte and secondary batteryOKUMURA TAKEFUMI·Filed 2006·Application pending·0 cites
- 2943US2005260501A1Electrolyte and lithium secondary batteryOKUMURA TAKEFUMI·Filed 2005·Application pending·0 cites
- 3042US2011143196A1Lithium secondary batteryHITACHI VEHICLE ENERGY LTD·Filed 2010·Application pending·0 cites
- 3142US2007287070A1Electrode for Polymer Electrolyte Secondary Battery and Polymer Electrolyte Secondary BatteryOKUMURA TAKEFUMI·Filed 2005·Application pending·0 cites
- 3240US2012100436A1Lithium-ion secondary batteryINOUE RYO·Filed 2010·Application pending·0 cites
- 3339US2003031932A1Electrolyte and lithium ion secondary batteryFiled 2001·Application pending·0 cites
- 3433US2016268608A1Lithium secondary battery, power storage apparatus including lithium secondary battery and method of manufacturing lithium secondary batteryHITACHI LTD·Filed 2015·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →