Inventor · disambiguated record
Koji Otsubo
Also filed as: OTSUBO KOJI
18 granted patents·3 pending applications·175 citations·filing 1975–2022
93Inventor score
Files withFUJITSU LTD9FUJITSU OPTICAL COMPONENTS LTD7KANZAKI PAPER MFG CO LTD1KUWATA NAOKI1OTSUBO KOJI1
Top patents by PatentIndex Score
21 records- 0195US11710914B2Optical moduleFUJITSU OPTICAL COMPONENTS LTD·Filed 2020·Granted Jul 25, 2023·16 cites·8 claims
- 0292US7522647B2Semiconductor laser and method of fabricating the sameFUJITSU LTD·Filed 2006·Granted Apr 21, 2009·28 cites·17 claims
- 0385US5373520ASurface emitting laser and method of manufacturing the sameFUJITSU LTD·Filed 1993·Granted Dec 13, 1994·57 cites·18 claims
- 0484US7998609B2Secondary cell replacing methodTOYOTA MOTOR CO LTD·Filed 2009·Granted Aug 16, 2011·4 cites·14 claims
- 0582US8031394B2Wavelength conversion system, optical integrated device and wavelength conversion methodFUJITSU LTD·Filed 2008·Granted Oct 4, 2011·6 cites·13 claims
- 0675US7595508B2Optical semiconductor device and method for fabricating the sameFUJITSU LTD·Filed 2004·Granted Sep 29, 2009·24 cites·10 claims
- 0775US7436586B2Wavelength conversion system, optical integrated device and wavelength conversion methodFUJITSU LTD·Filed 2006·Granted Oct 14, 2008·5 cites·12 claims
- 0867US10411823B2Optical transmitter and optical receiverFUJITSU OPTICAL COMPONENTS LTD·Filed 2018·Granted Sep 10, 2019·1 cites·8 claims
- 0964US7099363B2Surface-emitting laser with a low threshold value and low power consumption and method of manufacturing the sameFUJITSU LTD·Filed 2002·Granted Aug 29, 2006·7 cites·8 claims
- 1060US12047121B2Optical device, optical transmission apparatus, optical reception apparatus, and optical communication apparatusFUJITSU OPTICAL COMPONENTS LTD·Filed 2022·Granted Jul 23, 2024·0 cites·8 claims
- 1158US10714896B2Multi-wavelength light source and optical module using the sameFUJITSU OPTICAL COMPONENTS LTD·Filed 2019·Granted Jul 14, 2020·0 cites·17 claims
- 1255US11309985B2Light source device that includes a plurality of light sources with different wavelengths and method of controlling wavelengthsFUJITSU OPTICAL COMPONENTS LTD·Filed 2020·Granted Apr 19, 2022·0 cites·10 claims
- 1351US5404370APlanar light emitting device having a reduced optical lossFUJITSU LTD·Filed 1994·Granted Apr 4, 1995·14 cites·14 claims
- 1450US3956571AMethod for making electrostatic recording sheet and resulting productKANZAKI PAPER MFG CO LTD·Filed 1975·Granted May 11, 1976·13 cites·8 claims
- 1547US2003224241A1Secondary cell replacing methodFiled 2003·Application pending·0 cites
- 1642US7564883B2Optical semiconductor device and method for fabricating the sameFUJITSU LTD·Filed 2004·Granted Jul 21, 2009·0 cites·7 claims
- 1740US8130443B2Optical waveform reshaping deviceOTSUBO KOJI·Filed 2008·Granted Mar 6, 2012·0 cites·13 claims
- 1839US8965201B2Optical transmission device and optical transmission methodKUWATA NAOKI·Filed 2011·Granted Feb 24, 2015·0 cites·8 claims
- 1938US6728287B2Surface emitting semiconductor laser device capable of improving heat radiation efficiency and its manufacture methodFUJITSU LTD·Filed 2001·Granted Apr 27, 2004·0 cites·5 claims
- 2033US2015349911A1Optical receiverFUJITSU OPTICAL COMPONENTS LTD·Filed 2015·Application pending·0 cites
- 2133US2016142131A1Optical transmitter moduleFUJITSU OPTICAL COMPONENTS LTD·Filed 2015·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →