Inventor · disambiguated record
Eiji Kumagai
Also filed as: KUMAGAI EIJI
35 granted patents·4 pending applications·494 citations·filing 1988–2021
97Inventor score
Top patents by PatentIndex Score
39 records- 0193US6034937AOptical disc reproduction method and optical disc reproduction apparatusSONY CORP·Filed 1998·Granted Mar 7, 2000·90 cites·3 claims
- 0292US6034934ADisc reproduction apparatusSONY CORP·Filed 1998·Granted Mar 7, 2000·76 cites·8 claims
- 0391US6594210B2Disc drive apparatus and method for generating wobble informationSONY CORP·Filed 2001·Granted Jul 15, 2003·35 cites·21 claims
- 0488US12421363B2White easy-adhesive polyester film comprising a nitrogen-containing antistatic agentTOYO BOSEKI·Filed 2021·Granted Sep 23, 2025·1 cites·2 claims
- 0588US10008862B2Power storage device, power storage system, and control method of power storage deviceMURATA MANUFACTURING CO·Filed 2014·Granted Jun 26, 2018·17 cites·15 claims
- 0688US6147941AOptical disc device and optical disc discriminating methodSONY CORP·Filed 1998·Granted Nov 14, 2000·45 cites·21 claims
- 0784US6288987B1Optical disc device and optical disc discriminating methodSONY CORP·Filed 2000·Granted Sep 11, 2001·15 cites·30 claims
- 0883US9608451B2Electric power supplying apparatus, electric power supplying method, inverter, and electric vehicleSONY CORP·Filed 2013·Granted Mar 28, 2017·9 cites·13 claims
- 0983US6714509B2Disk recording medium and disk drive apparatusSONY CORP·Filed 2001·Granted Mar 30, 2004·16 cites·10 claims
- 1079US8907624B2Multi-battery pack battery system with direct communication between controller and the battery packsKUMAGAI EIJI·Filed 2011·Granted Dec 9, 2014·7 cites·5 claims
- 1178US6005832AOptical disc device and optical disc discriminating methodSONY CORP·Filed 1998·Granted Dec 21, 1999·31 cites·7 claims
- 1277US6252834B1Optical disc device and optical disc discriminating methodSONY CORP·Filed 1998·Granted Jun 26, 2001·30 cites·33 claims
- 1376US6288988B1Optical disc device and optical disc discriminating methodSONY CORP·Filed 2000·Granted Sep 11, 2001·9 cites·21 claims
- 1475US6757227B2Optical drive apparatus for use with different recording media, tracking control method for use therein, and optical discSONY CORP·Filed 2001·Granted Jun 29, 2004·12 cites·26 claims
- 1574US10587127B2Charging device, charging control method, electricity storage device, power storage device, power system, and electric vehicleMURATA MANUFACTURING CO·Filed 2015·Granted Mar 10, 2020·3 cites·15 claims
- 1674US7797067B2Production management program, production management method, and production management systemFUJITSU LTD·Filed 2007·Granted Sep 14, 2010·3 cites·9 claims
- 1771US9178366B2Battery monitor circuit, storage apparatus, electronic apparatus, electric-powered vehicle, and power systemKUMAGAI EIJI·Filed 2012·Granted Nov 3, 2015·4 cites·10 claims
- 1871US5703852AOptical disk reproducing apparatus having a cosine equalizer with boosted frequency characteristicsSONY CORP·Filed 1996·Granted Dec 30, 1997·23 cites·7 claims
- 1970US9419458B2Storage system, electronic device, electric vehicle and power systemKUMAGAI EIJI·Filed 2011·Granted Aug 16, 2016·4 cites·12 claims
- 2067US7274631B2Optical-disc driving apparatus, optical-disc driving method, storage medium, and programSONY CORP·Filed 2004·Granted Sep 25, 2007·6 cites·11 claims
- 2166US9608464B2Control device, electric storage system, electronic device, electric vehicle, and electric power system to boot up a power sourceKUMAGAI EIJI·Filed 2012·Granted Mar 28, 2017·2 cites·19 claims
- 2266US9270135B2Power supply apparatus and power supply switching methodSONY CORP·Filed 2013·Granted Feb 23, 2016·2 cites·13 claims
- 2365US6229772B1Optical disc device and optical disc discriminating methodSONY CORP·Filed 1998·Granted May 8, 2001·19 cites·18 claims
- 2463US2023392049A1Highly adhesive polyester filmTOYO BOSEKI·Filed 2021·Application pending·0 cites
- 2562US9966759B2Battery monitor circuit, storage apparatus, electronic apparatus, electric-powered vehicle, and power systemSONY CORP·Filed 2015·Granted May 8, 2018·1 cites·16 claims
- 2661US5636196AOptical disc apparatus with selectively shiftable seek operation capture rangeSONY CORP·Filed 1995·Granted Jun 3, 1997·16 cites·4 claims
- 2754US9991702B2Control device to boot up power sourceMURATA MANUFACTURING CO·Filed 2017·Granted Jun 5, 2018·0 cites·15 claims
- 2852US6248777B1Remedies for peripheral circulation disturbancesCHUGAI PHARMACEUTICAL CO LTD·Filed 1998·Granted Jun 19, 2001·5 cites·7 claims
- 2952US5003523AApparatus for recording and reproducing information on an optical disk with a focus servo system for avoiding influence of traverse signal during searchSONY CORP·Filed 1988·Granted Mar 26, 1991·8 cites·24 claims
- 3051US7544414B2Oriented syndiotactic polystyrene-base filmTOYO BOSEKI·Filed 2003·Granted Jun 9, 2009·5 cites·10 claims
- 3149US9034511B2Power storage apparatus, connection apparatus, power storage system, electronic device, motor-driven vehicle, and electric power systemADACHI TATSUYA·Filed 2011·Granted May 19, 2015·0 cites·15 claims
- 3246US9018911B2Electric circuit, charge control device, charge system, and control methodKUMAGAI EIJI·Filed 2011·Granted Apr 28, 2015·0 cites·7 claims
- 3344US9698449B2Storage system and output controllerKUMAGAI EIJI·Filed 2011·Granted Jul 4, 2017·0 cites·14 claims
- 3444US2005230370A1Laser beam machining equipment and method for machining by using laser beamDENSO CORP·Filed 2005·Application pending·0 cites
- 3542US9929559B2Electricity storage device, electricity storage system, and method for controlling electricity storage deviceSONY CORP·Filed 2014·Granted Mar 27, 2018·0 cites·6 claims
- 3640US2006065648A1Method and device for removing burr by high-density energy beamKAMEYAMA MICHIO·Filed 2005·Application pending·0 cites
- 3738US2002021637A1Recording apparatus, recording medium, reading apparatus, and recording medium determination methodSONY CORP·Filed 2001·Application pending·0 cites
- 3837US7379406B2Optical recording apparatus, and method for controlling laser power therein by filtering and then sampling a returned light signalSONY CORP·Filed 2001·Granted May 27, 2008·0 cites·16 claims
- 3935US6819642B2Data recording device, data reproducing device, and optical discSONY CORP·Filed 2001·Granted Nov 16, 2004·0 cites·20 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →