Inventor · disambiguated record
Yasuo Ohba
Also filed as: OHBA YASUO
75 granted patents·8 pending applications·1,939 citations·filing 1987–2023
99Inventor score
Top patents by PatentIndex Score
83 records- 0198US5929466ASemiconductor device and method of fabricating the sameTOSHIBA KK·Filed 1997·Granted Jul 27, 1999·167 cites·10 claims
- 0297US5656832ASemiconductor heterojunction device with ALN buffer layer of 3nm-10nm average film thicknessTOSHIBA KK·Filed 1995·Granted Aug 12, 1997·146 cites·12 claims
- 0395US9130127B2Semiconductor light emitting deviceKATSUNO HIROSHI·Filed 2011·Granted Sep 8, 2015·26 cites·15 claims
- 0495US5432808ACompound semicondutor light-emitting deviceTOSHIBA KK·Filed 1994·Granted Jul 11, 1995·155 cites·20 claims
- 0594US5998810ASemiconductor light-emitting diode having a p-type semiconductor layer formed on a light-emitting layerTOSHIBA KK·Filed 1997·Granted Dec 7, 1999·100 cites·8 claims
- 0694US5042043ASemiconductor laser using five-element compound semiconductorTOSHIBA KK·Filed 1990·Granted Aug 20, 1991·99 cites·16 claims
- 0793US8338844B2Semiconductor light emitting apparatus having stacked reflective dielectric filmsKATSUNO HIROSHI·Filed 2009·Granted Dec 25, 2012·19 cites·6 claims
- 0893US5740192ASemiconductor laserTOSHIBA KK·Filed 1996·Granted Apr 14, 1998·93 cites·22 claims
- 0993US5103271ASemiconductor light emitting device and method of fabricating the sameTOSHIBA KK·Filed 1990·Granted Apr 7, 1992·120 cites·5 claims
- 1093US5076860AAlgan compound semiconductor materialTOSHIBA KK·Filed 1989·Granted Dec 31, 1991·91 cites·12 claims
- 1190US8324611B2Semiconductor light emitting device and waferKANEKO KEI·Filed 2011·Granted Dec 4, 2012·7 cites·20 claims
- 1288US9184242B2Nitride semiconductor wafer, nitride semiconductor element, and method for manufacturing nitride semiconductor waferTOSHIBA KK·Filed 2014·Granted Nov 10, 2015·6 cites·18 claims
- 1388US5990495ASemiconductor light-emitting element and method for manufacturing the sameTOSHIBA KK·Filed 1996·Granted Nov 23, 1999·118 cites·12 claims
- 1487US8963177B2Semiconductor light emitting element and semiconductor light emitting deviceKATSUNO HIROSHI·Filed 2010·Granted Feb 24, 2015·7 cites·31 claims
- 1587US5005057ASemiconductor light-emitting diode and method of manufacturing the sameTOSHIBA KK·Filed 1990·Granted Apr 2, 1991·98 cites·13 claims
- 1686US8937325B2Semiconductor device, wafer, method for manufacturing semiconductor device, and method for manufacturing waferKUSHIBE MITSUHIRO·Filed 2012·Granted Jan 20, 2015·6 cites·18 claims
- 1786US8692228B2Semiconductor light emitting device and waferKANEKO KEI·Filed 2012·Granted Apr 8, 2014·4 cites·7 claims
- 1886US7176479B2Nitride compound semiconductor elementTOSHIBA KK·Filed 2004·Granted Feb 13, 2007·29 cites·13 claims
- 1985US7615794B2Semiconductor light emitting device and semiconductor light emitting apparatusTOSHIBA KK·Filed 2008·Granted Nov 10, 2009·13 cites·20 claims
- 2085US4809287ADouble-heterostructure semiconductor with mesa stripe waveguideTOSHIBA KK·Filed 1987·Granted Feb 28, 1989·31 cites·23 claims
- 2184US8017970B2Semiconductor light-emitting elementTOSHIBA KK·Filed 2009·Granted Sep 13, 2011·8 cites·20 claims
- 2283US8421085B2Semiconductor light-emitting deviceKATSUNO HIROSHI·Filed 2010·Granted Apr 16, 2013·7 cites·19 claims
- 2383US7638809B2Light emitting deviceTOSHIBA KK·Filed 2006·Granted Dec 29, 2009·10 cites·13 claims
- 2483US6242764B1III-N semiconductor light-emitting element having strain-moderating crystalline buffer layersTOSHIBA KK·Filed 1998·Granted Jun 5, 2001·86 cites·10 claims
- 2582US4928285AImpurity-doped semiconductor laser device for single wavelength oscillationTOSHIBA KK·Filed 1989·Granted May 22, 1990·32 cites·21 claims
- 2680US7902565B2Semiconductor light emitting device and method for manufacturing sameTOSHIBA KK·Filed 2008·Granted Mar 8, 2011·9 cites·11 claims
- 2780US4893313ASemiconductor laser device which has a double-hetero structure having an optimal layer thicknessTOSHIBA KK·Filed 1989·Granted Jan 9, 1990·23 cites·23 claims
- 2878US8569738B2Semiconductor light emitting device, wafer, method for manufacturing semiconductor light emitting device, and method for manufacturing waferKUSHIBE MITSUHIRO·Filed 2010·Granted Oct 29, 2013·3 cites·29 claims
- 2978US8470627B2Method for manufacturing semiconductor light emitting deviceOHBA YASUO·Filed 2012·Granted Jun 25, 2013·2 cites·20 claims
- 3078US8039830B2Semiconductor light emitting device and waferTOSHIBA KK·Filed 2009·Granted Oct 18, 2011·5 cites·15 claims
- 3178US5909040ASemiconductor device including quaternary buffer layer with pinholesTOSHIBA KK·Filed 1997·Granted Jun 1, 1999·45 cites·15 claims
- 3277US5044794AInk ribbon cassetteCANON KK·Filed 1989·Granted Sep 3, 1991·23 cites·16 claims
- 3376US4835117AManufacturing method for semiconductor laser with mesa stripeTOSHIBA KK·Filed 1988·Granted May 30, 1989·18 cites·7 claims
- 3475US7295699B2Image processing system, program, information storage medium, and image processing methodNAMCO BANDAI GAMES INC·Filed 2004·Granted Nov 13, 2007·12 cites·17 claims
- 3574US9070837B2Semiconductor light-emitting device and method for manufacturing sameKATSUNO HIROSHI·Filed 2009·Granted Jun 30, 2015·5 cites·13 claims
- 3674US4792958ASemiconductor laser with mesa stripe waveguide structureTOSHIBA KK·Filed 1987·Granted Dec 20, 1988·27 cites·14 claims
- 3773US9012888B2Semiconductor light emitting device, wafer, method for manufacturing semiconductor light emitting device, and method for manufacturing waferKUSHIBE MITSUHIRO·Filed 2012·Granted Apr 21, 2015·2 cites·14 claims
- 3873US8729594B2Semiconductor light-emitting elementTOSHIBA KK·Filed 2013·Granted May 20, 2014·2 cites·18 claims
- 3973US8329489B2Method for manufacturing semiconductor light emitting deviceOHBA YASUO·Filed 2009·Granted Dec 11, 2012·4 cites·20 claims
- 4073US5036521ASemiconductor laser deviceTOSHIBA KK·Filed 1989·Granted Jul 30, 1991·17 cites·12 claims
- 4172US8377724B2Method for producing semiconductor light-emitting elementTOSHIBA KK·Filed 2011·Granted Feb 19, 2013·2 cites·35 claims
- 4271US5273933AVapor phase growth method of forming film in process of manufacturing semiconductor deviceTOSHIBA KK·Filed 1992·Granted Dec 28, 1993·49 cites·14 claims
- 4370US9269868B2Semiconductor light emitting element and method for manufacturing semiconductor light emitting elementTOSHIBA KK·Filed 2014·Granted Feb 23, 2016·1 cites·32 claims
- 4470US8791498B2Semiconductor light emitting device and method for manufacturing sameKATSUNO HIROSHI·Filed 2010·Granted Jul 29, 2014·1 cites·30 claims
- 4570US4949349ADouble-heterostructure semiconductor with mesa stripe waveguideTOSHIBA KK·Filed 1988·Granted Aug 14, 1990·16 cites·17 claims
- 4669US5079184AMethod of manufacturing iii-iv group compound semiconductor deviceTOSHIBA KK·Filed 1990·Granted Jan 7, 1992·44 cites·24 claims
- 4768US8921886B2Semiconductor light emitting device, semiconductor light emitting apparatus, and method for manufacturing semiconductor light emitting deviceKATSUNO HIROSHI·Filed 2011·Granted Dec 30, 2014·2 cites·24 claims
- 4868US8513687B2Semiconductor light emitting device and semiconductor light emitting apparatusKATSUNO HIROSHI·Filed 2009·Granted Aug 20, 2013·3 cites·9 claims
- 4965US7964887B2Light emitting deviceTOSHIBA KK·Filed 2009·Granted Jun 21, 2011·2 cites·4 claims
- 5065USRE38805ESemiconductor device and method of fabricating the sameTOSHIBA KK·Filed 2001·Granted Oct 4, 2005·5 cites·90 claims
Showing the top 50 of 83 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →