Inventor · disambiguated record
Masayuki Ishikawa
Also filed as: ISHIKAWA MASAYUKI
194 granted patents·27 pending applications·5,518 citations·filing 1987–2023
99Inventor score
Files withTOSHIBA KK72SONY CORP17SEIKO EPSON CORP16SUMITOMO ELECTRIC INDUSTRIES13SANKYO SEIKI SEISAKUSHO KK9
Top patents by PatentIndex Score
221 records- 0198US8110421B2Light emitting device and method for manufacturing sameSUGIZAKI YOSHIAKI·Filed 2009·Granted Feb 7, 2012·67 cites·16 claims
- 0298US5864171ASemiconductor optoelectric device and method of manufacturing the sameTOSHIBA KK·Filed 1996·Granted Jan 26, 1999·161 cites·18 claims
- 0398US5696389ALight-emitting semiconductor deviceTOSHIBA KK·Filed 1995·Granted Dec 9, 1997·623 cites·21 claims
- 0496US6627552B1Method for preparing epitaxial-substrate and method for manufacturing semiconductor device employing the sameKABSUHIKI KAISHA TOSHIBA·Filed 2001·Granted Sep 30, 2003·134 cites·24 claims
- 0596US6015979ANitride-based semiconductor element and method for manufacturing the sameTOSHIBA KK·Filed 1998·Granted Jan 18, 2000·338 cites·18 claims
- 0695US10741306B2Composite cableSUMITOMO WIRING SYSTEMS·Filed 2019·Granted Aug 11, 2020·9 cites·13 claims
- 0795US6031858ASemiconductor laser and method of fabricating sameTOSHIBA KK·Filed 1997·Granted Feb 29, 2000·127 cites·11 claims
- 0894US6493001B1Method, apparatus and medium for describing a virtual shared space using virtual reality modeling languageSONY CORP·Filed 1999·Granted Dec 10, 2002·182 cites·52 claims
- 0994US6242761B1Nitride compound semiconductor light emitting deviceTOSHIBA KK·Filed 1998·Granted Jun 5, 2001·243 cites·19 claims
- 1094US5977565ASemiconductor light emitting diode having a capacitorTOSHIBA KK·Filed 1997·Granted Nov 2, 1999·157 cites·36 claims
- 1194US5821555ASemicoductor device having a hetero interface with a lowered barrierTOSHIBA KK·Filed 1996·Granted Oct 13, 1998·283 cites·4 claims
- 1293US11742112B2Insulated electric cableSUMITOMO ELECTRIC INDUSTRIES·Filed 2022·Granted Aug 29, 2023·1 cites·6 claims
- 1393US6873634B2Semiconductor laser diodeTOSHIBA KK·Filed 2001·Granted Mar 29, 2005·43 cites·21 claims
- 1493US6586874B1Image display device and light emission deviceTOSHIBA KK·Filed 1998·Granted Jul 1, 2003·96 cites·5 claims
- 1593US6400742B1Semiconductor laser and method of fabricating sameTOSHIBA KK·Filed 2000·Granted Jun 4, 2002·41 cites·21 claims
- 1693US6359919B1Gallium nitride-based compound semiconductor laser and method of manufacturing the sameTOSHIBA KK·Filed 2000·Granted Mar 19, 2002·35 cites·22 claims
- 1793US5153889ASemiconductor light emitting deviceTOSHIBA KK·Filed 1991·Granted Oct 6, 1992·140 cites·10 claims
- 1892US10468157B2Insulated electric cableSUMITOMO ELECTRIC INDUSTRIES·Filed 2018·Granted Nov 5, 2019·3 cites·1 claims
- 1992US5987048AGallium nitride-based compound semiconductor laser and method of manufacturing the sameTOSHIBA KK·Filed 1997·Granted Nov 16, 1999·76 cites·10 claims
- 2091US11101054B2Core wire for multi-core cables and multi-core cableSUMITOMO ELECTRIC INDUSTRIES·Filed 2018·Granted Aug 24, 2021·3 cites·8 claims
- 2191US9905338B2Insulated electric cableSUMITOMO ELECTRIC INDUSTRIES·Filed 2014·Granted Feb 27, 2018·5 cites·4 claims
- 2291US6758579B2Illuminating-light controller, projector, and illuminating-light control methodIBM·Filed 2001·Granted Jul 6, 2004·43 cites·19 claims
- 2391US6741623B2Semiconductor device, semiconductor laser, their manufacturing methods and etching methodsTOSHIBA KK·Filed 2001·Granted May 25, 2004·31 cites·17 claims
- 2491US6466239B2Method and apparatus for editing data used in creating a three-dimensional virtual reality environmentSONY CORP·Filed 1998·Granted Oct 15, 2002·139 cites·12 claims
- 2591US5981977ANitride compound semiconductor light emitting element and its manufacturing methodTOSHIBA KK·Filed 1998·Granted Nov 9, 1999·92 cites·18 claims
- 2689US9555972B2Conveyor belt and belt constituent membersTSUBAKIMOTO CHAIN CO·Filed 2013·Granted Jan 31, 2017·15 cites·8 claims
- 2789US8373192B2Semiconductor light emitting deviceTOSHIBA KK·Filed 2010·Granted Feb 12, 2013·11 cites·20 claims
- 2889US5048035ASemiconductor light emitting deviceTOSHIBA KK·Filed 1990·Granted Sep 10, 1991·94 cites·14 claims
- 2988US10672538B2Composite cableSUMITOMO WIRING SYSTEMS·Filed 2018·Granted Jun 2, 2020·3 cites·4 claims
- 3088US8436378B2Semiconductor light emitting device and method for manufacturing sameKOJIMA AKIHIRO·Filed 2010·Granted May 7, 2013·10 cites·22 claims
- 3188US8377726B2Method for manufacturing light emitting device and light emitting deviceTOSHIBA KK·Filed 2010·Granted Feb 19, 2013·10 cites·17 claims
- 3288US8009380B2Disk drive and method for controlling clearance in the disk driveHITACHI GLOBAL STORAGE TECH NL·Filed 2009·Granted Aug 30, 2011·8 cites·15 claims
- 3388US6720583B2Optical device, surface emitting type device and method for manufacturing the sameTOSHIBA KK·Filed 2001·Granted Apr 13, 2004·56 cites·7 claims
- 3488US5160447ACompressed powder magnetic core and method for fabricating sameSANKYO SEIKI SEISAKUSHO KK·Filed 1989·Granted Nov 3, 1992·61 cites·7 claims
- 3587US8378377B2Light emitting deviceTOSHIBA KK·Filed 2010·Granted Feb 19, 2013·9 cites·16 claims
- 3686US6734747B1Piezoelectric oscillatorTOYO COMMUNICATION EQUIP·Filed 2000·Granted May 11, 2004·27 cites·6 claims
- 3786US6118801AGallium nitride-based compound semiconductor laser and method of manufacturing the sameTOSHIBA KK·Filed 1999·Granted Sep 12, 2000·51 cites·22 claims
- 3885US11473842B2Melting work device and melting work methodSINTOKOGIO LTD·Filed 2018·Granted Oct 18, 2022·3 cites·28 claims
- 3985US10861621B2Insulated electric cableSUMITOMO ELECTRIC INDUSTRIES·Filed 2019·Granted Dec 8, 2020·1 cites·4 claims
- 4085US10697477B2Servo valveSMC CORP·Filed 2018·Granted Jun 30, 2020·2 cites·15 claims
- 4185US8884327B2Semiconductor light emitting device and method for manufacturing sameSUGIZAKI YOSHIAKI·Filed 2010·Granted Nov 11, 2014·4 cites·26 claims
- 4285US6185238B1Nitride compound semiconductor laser and its manufacturing methodTOSHIBA KK·Filed 1998·Granted Feb 6, 2001·80 cites·23 claims
- 4385US5488233ASemiconductor light-emitting device with compound semiconductor layerTOSHIBA KK·Filed 1994·Granted Jan 30, 1996·66 cites·24 claims
- 4485US4809287ADouble-heterostructure semiconductor with mesa stripe waveguideTOSHIBA KK·Filed 1987·Granted Feb 28, 1989·31 cites·23 claims
- 4584US8991275B2Two-way push-pull chain and reciprocating actuatorTSUBAKIMOTO CHAIN CO·Filed 2013·Granted Mar 31, 2015·6 cites·7 claims
- 4684US8314662B2Temperature compensation method for piezoelectric oscillator, and piezoelectric oscillatorISOHATA KENSAKU·Filed 2010·Granted Nov 20, 2012·10 cites·11 claims
- 4784US7808741B2Head slider and disk drive deviceHITACHI GLOBAL STORAGE TECH·Filed 2008·Granted Oct 5, 2010·7 cites·18 claims
- 4884US7245486B2Cooling air intake structure and desk top computerSONY CORP·Filed 2005·Granted Jul 17, 2007·13 cites·11 claims
- 4984US5693963ACompound semiconductor device with nitrideTOSHIBA KK·Filed 1995·Granted Dec 2, 1997·96 cites·20 claims
- 5083US10262774B2Insulated electric cableSUMITOMO ELECTRIC INDUSTRIES·Filed 2017·Granted Apr 16, 2019·1 cites·3 claims
Showing the top 50 of 221 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Masayuki Ishikawa files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →