Inventor · disambiguated record
Keiji Nakamura
Also filed as: NAKAMURA KEIJI
56 granted patents·9 pending applications·639 citations·filing 1980–2022
98Inventor score
Files withMITSUBISHI ELECTRIC CORP22MITSUBISHI RAYON CO7MABUCHI MOTOR CO5NEC CORP5FUJI HEAVY IND LTD3
Top patents by PatentIndex Score
65 records- 0197US5434834AOptical recording and reproducing apparatus for tracking wobbling guide groovesMITSUBISHI ELECTRIC CORP·Filed 1994·Granted Jul 18, 1995·121 cites·7 claims
- 0290US5303216AOptical recording and reproducing apparatus for tracking wobbling guide groovesMITSUBISHI ELECTRIC CORP·Filed 1992·Granted Apr 12, 1994·43 cites·22 claims
- 0387US5247493AMagneto-optical recording and reproducing disk device having a bimorph type actuator with specific structures for mounting a magnetic head in opposing to the surface of the diskMITSUBISHI ELECTRIC CORP·Filed 1989·Granted Sep 21, 1993·35 cites·15 claims
- 0487US4570096AElectromechanical translation device comprising an electrostrictive driver of a stacked ceramic capacitor typeNEC CORP·Filed 1984·Granted Feb 11, 1986·47 cites·3 claims
- 0581US5383169AOptical recording and reproducing apparatus for tracking wobbling guide groovesMITSUBISHI ELECTRIC CORP·Filed 1994·Granted Jan 17, 1995·24 cites·7 claims
- 0677US5176341AAirship yaw line tractorMITSUI SHIPBUILDING ENG·Filed 1991·Granted Jan 5, 1993·39 cites·3 claims
- 0775US5182739AApparatus for maintaining a disk and optical head in orthogonal relationMITSUBISHI ELECTRIC CORP·Filed 1990·Granted Jan 26, 1993·24 cites·11 claims
- 0874US4778288AAutomatic print zone setting systemSHARP KK·Filed 1986·Granted Oct 18, 1988·21 cites·7 claims
- 0973US7209260B1Image processing apparatusSHARP KK·Filed 2000·Granted Apr 24, 2007·19 cites·5 claims
- 1073US5972131AAg-Cu alloy for a sliding contactTANAKA PRECIOUS METAL IND·Filed 1997·Granted Oct 26, 1999·24 cites·10 claims
- 1172US10549377B2Welding assistance member and spot-welding method using welding assistance memberFUJI HEAVY IND LTD·Filed 2016·Granted Feb 4, 2020·1 cites·2 claims
- 1271US6449411B1Optical wavelength tunable filterNEC CORP·Filed 2000·Granted Sep 10, 2002·13 cites·17 claims
- 1370US10564381B2Illumination deviceMITSUBISHI ELECTRIC CORP·Filed 2017·Granted Feb 18, 2020·1 cites·20 claims
- 1470US4348232AAbrasion resistant ferro-based sintered alloyNIPPON PISTON RING CO LTD·Filed 1980·Granted Sep 7, 1982·17 cites·2 claims
- 1569US7876017B2Commutator and brush materials for small electric motor, clad composite material, and small electric DC motor using the sameMABUCHI MOTOR CO·Filed 2006·Granted Jan 25, 2011·2 cites·5 claims
- 1669US7239461B2Objective lens drive deviceMITSUBISHI ELECTRIC CORP·Filed 2003·Granted Jul 3, 2007·7 cites·35 claims
- 1769US5305294AMagneto-optical recording/reproducing system having an electromagnetic actuatorMITSUBISHI ELECTRIC CORP·Filed 1993·Granted Apr 19, 1994·28 cites·9 claims
- 1868US5986984AOptical information processing device having switchable optics for use with plural media typesMITSUBISHI ELECTRIC CORP·Filed 1996·Granted Nov 16, 1999·23 cites·27 claims
- 1965US4428691ADot matrix printer headNIPPON ELECTRIC CO·Filed 1981·Granted Jan 31, 1984·13 cites·1 claims
- 2064US2018297142A1Member joining structureSUBARU CORP·Filed 2018·Application pending·0 cites
- 2163US7016125B2Objective lens-driving apparatusMITSUBISHI ELECTRIC CORP·Filed 2003·Granted Mar 21, 2006·4 cites·8 claims
- 2263US6687062B2Objective lens-driving apparatusMITSUBISHI ELECTRIC CORP·Filed 2002·Granted Feb 3, 2004·4 cites·14 claims
- 2362US6833409B2Impact modifier, process for producing the same, and thermoplastic resin composition containing the sameMITSUBISHI RAYON CO·Filed 2001·Granted Dec 21, 2004·5 cites·17 claims
- 2462US6646792B2Light amplifier and light transmission system using the sameNEC CORP·Filed 2002·Granted Nov 11, 2003·6 cites·12 claims
- 2561US6888689B2Objective lens driving apparatusMITSUBISHI ELECTRIC CORP·Filed 2004·Granted May 3, 2005·3 cites·1 claims
- 2660US2025350080A1Sliding contact material for motor brush, motor brush, and direct current motorMABUCHI MOTOR CO·Filed 2022·Application pending·0 cites
- 2759US7317043B2Impact modifier, process for producing the same, and thermoplastic resin compositionMITSUBISHI RAYON CO·Filed 2003·Granted Jan 8, 2008·4 cites·31 claims
- 2858US8040138B2Planar type frequency shift probe for measuring plasma electron densities and method and apparatus for measuring plasma electron densitiesUNIV NAGOYA NAT UNIV CORP·Filed 2006·Granted Oct 18, 2011·3 cites·11 claims
- 2958US4578317AJournalNIPPON PISTON RING CO LTD·Filed 1983·Granted Mar 25, 1986·13 cites·6 claims
- 3057US10052711B2Member joining structureFUJI HEAVY IND LTD·Filed 2015·Granted Aug 21, 2018·0 cites·5 claims
- 3157US7160632B2Material for sliding contacts, clad composite material and small-sized DC motor using the sameTANAKA PRECIOUS METAL IND·Filed 2004·Granted Jan 9, 2007·9 cites·23 claims
- 3256US7671129B2Polycarbonate/graft copolymer compositionsMITSUBISHI RAYON CO·Filed 2004·Granted Mar 2, 2010·3 cites·2 claims
- 3354US12000695B2Electrode-misalignment detection device in resistance welderSUBARU CORP·Filed 2021·Granted Jun 4, 2024·0 cites·4 claims
- 3454US6486234B1Impact modifier, process for production, and resin composition containing the sameMITSUBISHI RAYON CO·Filed 1999·Granted Nov 26, 2002·11 cites·22 claims
- 3554US6245166B1Material for sliding contact, composite clad material, and small-sized direct current motor using the sameMABUCHI MOTOR CO·Filed 1998·Granted Jun 12, 2001·20 cites·15 claims
- 3653USD329657SCastanetKK ZEN ON GAKUFU SHUPPANSHA·Filed 1990·Granted Sep 22, 1992·7 cites·1 claims
- 3751US9688047B2Hemmed structure and hemming methodFUJI HEAVY IND LTD·Filed 2015·Granted Jun 27, 2017·0 cites·9 claims
- 3851US9341793B2Light source deviceMITSUBISHI ELECTRIC CORP·Filed 2014·Granted May 17, 2016·0 cites·7 claims
- 3951US8154980B2Object lens driving apparatus and manufacturing method thereofYABE MITORU·Filed 2007·Granted Apr 10, 2012·0 cites·13 claims
- 4051US8042130B2Optical driving device including a holder with a top face having a closed structureMITSUBISHI ELECTRIC CORP·Filed 2007·Granted Oct 18, 2011·0 cites·10 claims
- 4151US7701812B2Optical element driving apparatusMITSUBISHI ELECTRIC CORP·Filed 2007·Granted Apr 20, 2010·0 cites·8 claims
- 4250US2022277255A1Work reliever mediation system and farm machine sharer mediation systemYANMAR POWER TECHNOLOGY CO LTD·Filed 2020·Application pending·0 cites
- 4349US9206310B2Modifier for resin and resin composition using the same and formed articleMITSUBISHI RAYON CO·Filed 2014·Granted Dec 8, 2015·0 cites·6 claims
- 4449US7870572B2Objective lens driving apparatus, assembling method thereof and optical headMITSUBISHI ELECTRIC CORP·Filed 2005·Granted Jan 11, 2011·0 cites·11 claims
- 4548US8171506B2Optical-system driving device effecting switchover between objective lenses for achieving focal spotsNAKAMURA KEIJI·Filed 2006·Granted May 1, 2012·0 cites·10 claims
- 4648US6521376B1Non-aqueous liquid electrolyte cellHITACHI MAXELL·Filed 2000·Granted Feb 18, 2003·1 cites·5 claims
- 4747US7031234B2Objective lens driving apparatusMITSUBISHI ELECTRIC CORP·Filed 2004·Granted Apr 18, 2006·0 cites·5 claims
- 4846US8383726B2Impact resistance improver, thermoplastic resin composition, shaped article and method for producing graft copolymerMITSUBISHI RAYON CO·Filed 2007·Granted Feb 26, 2013·0 cites·18 claims
- 4946US6638334B2Sliding contact material comprising Ag-Ni based alloy having Ni metal particles dispersed and clad composite material, and Dc compact motor using the sameMABUCHI MOTOR CO·Filed 2001·Granted Oct 28, 2003·5 cites·20 claims
- 5046US5942581ALubricant for a thermoplastic resin and a thermoplastic resin composition comprising thereofMITSUBISHI RAYON CO·Filed 1996·Granted Aug 24, 1999·10 cites·9 claims
Showing the top 50 of 65 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →