Inventor · disambiguated record
Masahiro Nakajima
Also filed as: NAKAJIMA MASAHIRO · WATANABE MASAYUKI
92 granted patents·9 pending applications·2,083 citations·filing 1976–2024
99Inventor score
Top patents by PatentIndex Score
101 records- 0199US7118284B2Optical connector plug, optical connector adapter and optical connectorSEIKO GIKEN KK·Filed 2005·Granted Oct 10, 2006·126 cites·20 claims
- 0298US6151432AUniversal optical fiber connectors and basic plugs thereofSEIKO INSTR INC·Filed 1997·Granted Nov 21, 2000·275 cites·7 claims
- 0397US6533468B2Universal optical fiber connectors and basic plugs thereofSEIKO INSTR INC·Filed 2001·Granted Mar 18, 2003·104 cites·13 claims
- 0496US7118283B2Optical connector plug, optical connector adapter and optical connectorSEIKO GIKEN KK·Filed 2005·Granted Oct 10, 2006·55 cites·12 claims
- 0596US6908233B2Optical connector plug, optical connector adapter and optical connectorSEIKO INSTR INC·Filed 2003·Granted Jun 21, 2005·85 cites·25 claims
- 0696US6224270B1Universal optical fiber connectors and basic plugs thereofSEIKO INSTR INC·Filed 1999·Granted May 1, 2001·152 cites·20 claims
- 0795US6431762B1Optical connector adapterSEIKO INSTR INC·Filed 2000·Granted Aug 13, 2002·258 cites·32 claims
- 0894US8702301B2Timepiece bearing, movement, and portable timepieceHIRAOKA MASASHI·Filed 2010·Granted Apr 22, 2014·18 cites·25 claims
- 0994US4918264AActuating mechanism and multiposition rubber or membrane switch deviceASAHI OPTICAL CO LTD·Filed 1988·Granted Apr 17, 1990·63 cites·25 claims
- 1093US9753433B2Mechanical component, movement, and timepieceSEIKO INSTR INC·Filed 2015·Granted Sep 5, 2017·6 cites·18 claims
- 1193US9678477B2Mechanical component, mechanical component manufacturing method, movement, and timepieceSEIKO INSTR INC·Filed 2015·Granted Jun 13, 2017·7 cites·16 claims
- 1292US7090409B2Optical functioning component and optical connector having optical functioning componentNIPPON TELEGRAPH & TELEPHONE·Filed 2003·Granted Aug 15, 2006·61 cites·24 claims
- 1387US9188956B2Balance, timepiece movement, timepiece and manufacturing method of balanceSEIKO INSTR INC·Filed 2013·Granted Nov 17, 2015·6 cites·18 claims
- 1487US5621495ARepresentation of depth of field in cameraASAHI OPTICAL CO LTD·Filed 1995·Granted Apr 15, 1997·21 cites·30 claims
- 1586US9665069B2Electric generator device, timepiece movement, and timepieceASAHI GLASS CO LTD·Filed 2016·Granted May 30, 2017·6 cites·20 claims
- 1686US9128465B2Balance with hairspring, movement, and timepieceSEIKO INSTR INC·Filed 2014·Granted Sep 8, 2015·5 cites·20 claims
- 1786US6565261B1Optical fiber connectorSEIKO INSTR INC·Filed 2000·Granted May 20, 2003·36 cites·12 claims
- 1886US6486419B2Multifunctional image forming apparatus having a covered main power switchRICOH KK·Filed 1999·Granted Nov 26, 2002·48 cites·6 claims
- 1984US10184370B2Oil separation device for internal combustion engineHONDA MOTOR CO LTD·Filed 2017·Granted Jan 22, 2019·2 cites·13 claims
- 2084US6075958AImage forming apparatus with first and second openable coversRICOH KK·Filed 1998·Granted Jun 13, 2000·34 cites·20 claims
- 2183US5019852ARepresentation of depth of field in cameraASAHI OPTICAL CO LTD·Filed 1989·Granted May 28, 1991·15 cites·35 claims
- 2282US5649130ACleaning sheet, a cleaning member and a cleaning apparatus for a fuser rollJAPAN VILENE CO LTD·Filed 1996·Granted Jul 15, 1997·31 cites·10 claims
- 2380US7146911B2Image recorderDAINIPPON SCREEN MFG·Filed 2005·Granted Dec 12, 2006·4 cites·5 claims
- 2479US9568887B2Operation stabilizing mechanism, movement, and mechanical timepieceSEIKO INSTR INC·Filed 2016·Granted Feb 14, 2017·2 cites·17 claims
- 2577US5913001AOptical connector assembling adhesive injection pipe and method of assembling an optical connector using the sameSEIKO INSTR INC·Filed 1997·Granted Jun 15, 1999·67 cites·2 claims
- 2676US5877098AAbrasive sheet made of very fine and ultrafine fibersJAPAN VILENE CO LTD·Filed 1997·Granted Mar 2, 1999·50 cites·21 claims
- 2775US10465374B2Frame structure and method of constructing frame structureSUMITOMO MITSUI CONSTRUCTION CO LTD·Filed 2015·Granted Nov 5, 2019·9 cites·10 claims
- 2875US6464406B1Universal adapterSEIKO INSTR INC·Filed 2000·Granted Oct 15, 2002·18 cites·25 claims
- 2972US4949118AIndicating apparatus within finder of single-lens reflex cameraASAHI OPTICAL CO LTD·Filed 1988·Granted Aug 14, 1990·12 cites·16 claims
- 3071US4523323ADigital signal communication system for multi-level modulation including unique encoder and decoderNIPPON ELECTRIC CO·Filed 1983·Granted Jun 11, 1985·31 cites·9 claims
- 3171US4196171AApparatus for making a single crystal of III-V compound semiconductive materialTOKYO SHIBAURA ELECTRIC CO·Filed 1978·Granted Apr 1, 1980·18 cites·6 claims
- 3270US9052693B2Constant force device, movement and mechanical timepieceSEIKO INSTR INC·Filed 2014·Granted Jun 9, 2015·2 cites·20 claims
- 3370US5544087ANavigation systemSUMITOMO ELECTRIC INDUSTRIES·Filed 1994·Granted Aug 6, 1996·37 cites·25 claims
- 3469US6431783B2Optical fiber connecting structure and connecting member for connecting an optical fiber cable to a ferruleSEIKO INSTR INC·Filed 1998·Granted Aug 13, 2002·33 cites·31 claims
- 3569US4133857AMethod for producing a granular sorbic acidCHISSO CORP·Filed 1976·Granted Jan 9, 1979·8 cites·11 claims
- 3668US4887114ABack-cover release device for a cameraASAHI OPTICAL CO LTD·Filed 1989·Granted Dec 12, 1989·10 cites·4 claims
- 3764US6419401B1Optical connector ferruleSEIKO INSTR INC·Filed 1997·Granted Jul 16, 2002·26 cites·14 claims
- 3863US5712632ANavigation apparatus for land vehicle inputting road traffic informationSUMITOMO ELECTRIC INDUSTRIES·Filed 1995·Granted Jan 27, 1998·69 cites·19 claims
- 3963US4977425AIndicating apparatus within finder of cameraASAHI OPTICAL CO LTD·Filed 1988·Granted Dec 11, 1990·7 cites·11 claims
- 4062US4825137ATime base control system for a spindle servoPIONEER ELECTRONIC CORP·Filed 1987·Granted Apr 25, 1989·13 cites·6 claims
- 4161US5510875ARepresentation of depth of field in cameraASAHI OPTICAL CO LTD·Filed 1993·Granted Apr 23, 1996·7 cites·38 claims
- 4260US10462268B2Data transmitting/receiving apparatus and data transmitting/receiving methodMITSUBISHI ELECTRIC CORP·Filed 2017·Granted Oct 29, 2019·1 cites·5 claims
- 4360US2024426529A1Refrigerant compressor with return openingIHI CORP·Filed 2024·Application pending·0 cites
- 4459US9164486B2Operation stabilization mechanism, movement, and mechanical timepieceSEIKO INSTR INC·Filed 2014·Granted Oct 20, 2015·1 cites·20 claims
- 4559US6736392B1Image forming apparatusRICOH KK·Filed 1998·Granted May 18, 2004·10 cites·23 claims
- 4659US2025075733A1Radial foil bearingIHI CORP·Filed 2024·Application pending·0 cites
- 4758US12345293B2Thrust foil bearingIHI CORP·Filed 2021·Granted Jul 1, 2025·0 cites·6 claims
- 4858US9817369B1Mechanical component, mechanical component manufacturing method, movement, and timepieceSEIKO INSTR INC·Filed 2017·Granted Nov 14, 2017·0 cites·13 claims
- 4958US7709981B2Stator, motor and record medium drive apparatus and method of fabricating statorSEIKO INSTR INC·Filed 2007·Granted May 4, 2010·2 cites·17 claims
- 5058US6328298B1Image forming apparatus and finisher thereforRICOH KK·Filed 1998·Granted Dec 11, 2001·18 cites·6 claims
Showing the top 50 of 101 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →