Inventor · disambiguated record
Takashi Takahashi
Also filed as: HIRAKI HIDEAKI · TAKAHASHI TAKASHI
159 granted patents·45 pending applications·3,255 citations·filing 1977–2025
99Inventor score
Top patents by PatentIndex Score
204 records- 0199US6803604B2Semiconductor optical modulator, an optical amplifier and an integrated semiconductor light-emitting deviceRICOH KK·Filed 2002·Granted Oct 12, 2004·129 cites·6 claims
- 0299US6674785B2Vertical-cavity, surface-emission type laser diode and fabrication process thereofRICOH KK·Filed 2001·Granted Jan 6, 2004·99 cites·17 claims
- 0399US6614821B1Laser diode and semiconductor light-emitting device producing visible-wavelength radiationRICOH KK·Filed 2000·Granted Sep 2, 2003·129 cites·5 claims
- 0499US6542528B1Light-emitting semiconductor device producing red wavelength optical radiationRICOH KK·Filed 2000·Granted Apr 1, 2003·131 cites·63 claims
- 0599US5037361ATraction type transmissionTAKAHASHI TAKASHI·Filed 1990·Granted Aug 6, 1991·276 cites·5 claims
- 0698US6959025B2Surface-emitting laser diode having reduced device resistance and capable of performing high output operation, surface-emitting laser diode array, electrophotographic system, surface-emitting laser diode module, optical telecommunication system, optical interconnection system using the surface-emitting laser diode, and method of fabricating the surface-emitting laser diodeRICOH KK·Filed 2003·Granted Oct 25, 2005·103 cites·18 claims
- 0797US6975663B2Surface-emission laser diode operable in the wavelength band of 1.1-7μm and optical telecommunication system using such a laser diodeRICOH KK·Filed 2002·Granted Dec 13, 2005·88 cites·28 claims
- 0897US6765232B2Semiconductor light-emitting device, surface-emission laser diode, and production apparatus thereof, production method, optical module and optical telecommunication systemRICOH KK·Filed 2002·Granted Jul 20, 2004·155 cites·44 claims
- 0997US5627851ASemiconductor light emitting deviceRICOH KK·Filed 1996·Granted May 6, 1997·169 cites·5 claims
- 1095US6563851B1Laser diode having an active layer containing N and operable in a 0.6 μm wavelength bandRICOH KK·Filed 1999·Granted May 13, 2003·107 cites·24 claims
- 1195US4621541AApparatus for changing rotational speed with the aid of clutching activityTAKAHASHI TAKASHI·Filed 1984·Granted Nov 11, 1986·48 cites·4 claims
- 1294US7787511B2Array of surface-emitting laser diodes having reduced device resistance and capable of performing high output operation and method of fabricating the surface-emitting laser diodeRICOH KK·Filed 2005·Granted Aug 31, 2010·21 cites·4 claims
- 1394US6207973B1Light emitting devices with layered III-V semiconductor structuresRICOH KK·Filed 1999·Granted Mar 27, 2001·191 cites·41 claims
- 1494US5684523AOptical line printhead and an LED chip used thereforRICOH KK·Filed 1995·Granted Nov 4, 1997·145 cites·46 claims
- 1592US9985924B2Posting content to social mediumIBM·Filed 2016·Granted May 29, 2018·6 cites·7 claims
- 1692US9961038B2Posting content to social mediumIBM·Filed 2015·Granted May 1, 2018·7 cites·6 claims
- 1792US6927412B2Semiconductor light emitterRICOH KK·Filed 2003·Granted Aug 9, 2005·78 cites·7 claims
- 1890US7235816B2Semiconductor light emitterRICOH KK·Filed 2005·Granted Jun 26, 2007·14 cites·2 claims
- 1989US7260137B2Vertical-cavity surface-emission type laser diode and fabrication process thereofRICOH KK·Filed 2006·Granted Aug 21, 2007·8 cites·9 claims
- 2089US7180100B2Semiconductor light-emitting device, surface-emission laser diode, and production apparatus thereof, production method, optical module and optical telecommunication systemRICOH KK·Filed 2004·Granted Feb 20, 2007·24 cites·1 claims
- 2188US8710022B2Cell proliferation inhibitorTAKAHASHI TAKASHI·Filed 2009·Granted Apr 29, 2014·14 cites·6 claims
- 2288US7453096B2Method of fabricating a semiconductor light-emitting deviceRICOH KK·Filed 2006·Granted Nov 18, 2008·11 cites·6 claims
- 2388US7376164B2Vertical cavity surface emitting semiconductor laser, light emission device, and optical transmission systemRICOH KK·Filed 2005·Granted May 20, 2008·10 cites·12 claims
- 2488US7170825B2Power reserve display mechanism and mechanical timepiece having the sameSEIKO INSTR INC·Filed 2006·Granted Jan 30, 2007·12 cites·8 claims
- 2587US10560420B2Posting content to social mediumIBM·Filed 2018·Granted Feb 11, 2020·3 cites·8 claims
- 2687US8279519B2Semiconductor optical modulator, an optical amplifier and an integrated semiconductor light-emitting deviceTAKAHASHI TAKASHI·Filed 2010·Granted Oct 2, 2012·6 cites·4 claims
- 2787US7391800B2Vertical cavity surface-emitting semiconductor laser device, optical transmission module, optical transmission device, and optical switching methodRICOH KK·Filed 2006·Granted Jun 24, 2008·8 cites·13 claims
- 2887US7245647B2Surface-emission laser diode operable in the wavelength band of 1.1-1.7mum and optical telecommunication system using such a laser diodeRICOH KK·Filed 2003·Granted Jul 17, 2007·28 cites·13 claims
- 2987US5956294AMulti-functional timepieceSEIKO INSTR INC·Filed 1997·Granted Sep 21, 1999·40 cites·38 claims
- 3087US5334740ACyclohexanetriol derivativesKURARAY CO·Filed 1992·Granted Aug 2, 1994·32 cites·9 claims
- 3185US7872270B2Semiconductor light emitterRICOH CO LTD·Filed 2010·Granted Jan 18, 2011·3 cites·20 claims
- 3285US7590159B2Surface-emission laser diode operable in the wavelength band of 1.1-1.7 micrometers and optical telecommunication system using such a laser diodeRICOH KK·Filed 2007·Granted Sep 15, 2009·9 cites·5 claims
- 3383US11258341B2Rotational electric machine rotorTOYOTA MOTOR CO LTD·Filed 2021·Granted Feb 22, 2022·1 cites·2 claims
- 3483US10917487B2Generating notification digest based on user presenceIBM·Filed 2019·Granted Feb 9, 2021·5 cites·18 claims
- 3582US7968362B2Semiconductor light-emitting device, surface-emission laser diode, and production apparatus thereof, production method, optical module and optical telecommunication systemRICOH CO LTD·Filed 2009·Granted Jun 28, 2011·6 cites·15 claims
- 3682US6657233B2Light emitting devices with layered III-V semiconductor structures, and modules and systems for computer, network and optical communication, using such deviceRICOH KK·Filed 2000·Granted Dec 2, 2003·33 cites·47 claims
- 3782US4944195AControlling transmissionTAKAHASHI TAKASHI·Filed 1988·Granted Jul 31, 1990·35 cites·5 claims
- 3881US7881357B2Vertical cavity surface-emitting semiconductor laser device, optical transmission module, optical transmission device, and optical switching methodRICOH CO LTD·Filed 2008·Granted Feb 1, 2011·5 cites·13 claims
- 3981US7518161B2Semiconductor light-emitting device, surface-emission laser diode, and production apparatus thereof, production method, optical module and optical telecommunication systemRICOH KK·Filed 2006·Granted Apr 14, 2009·5 cites·5 claims
- 4081US6829271B2Light-emitting semiconductor device producing red wavelength optical radiationRICOH KK·Filed 2003·Granted Dec 7, 2004·14 cites·5 claims
- 4180US10518642B2Vehicle interior component and method for producing sameCALSONIC KANSEI CORP·Filed 2016·Granted Dec 31, 2019·2 cites·8 claims
- 4280US5313095AMultiple-chip semiconductor device and a method of manufacturing the sameMITSUBISHI ELECTRIC CORP·Filed 1993·Granted May 17, 1994·66 cites·5 claims
- 4380US4259292AGas detecting elementTOKYO SHIBAURA ELECTRIC CO·Filed 1978·Granted Mar 31, 1981·34 cites·9 claims
- 4480US2025377138A1Air conditioning system and ventilation apparatusDAIKIN IND LTD·Filed 2025·Application pending·0 cites
- 4579US11038833B2Posting content to social mediumAIRBNB INC·Filed 2019·Granted Jun 15, 2021·1 cites·16 claims
- 4679US7029169B2Chronograph timepiece having zeroing structureSEIKO INSTR INC·Filed 2004·Granted Apr 18, 2006·24 cites·6 claims
- 4779US7022539B2Vertical-cavity, surface-emission type laser diode and fabrication process thereofRICOH KK·Filed 2003·Granted Apr 4, 2006·10 cites·3 claims
- 4879US6343422B1Tilt angel measuring deviceTOPCON CORP·Filed 2000·Granted Feb 5, 2002·38 cites·5 claims
- 4978US7067846B2Semiconductor light-emitting device, surface-emission laser diode, and production apparatus thereof, production method, optical module and optical telecommunication systemRICOH KK·Filed 2004·Granted Jun 27, 2006·22 cites·12 claims
- 5077US7139297B2Laser diode and semiconductor light-emitting device producing visible-wavelength radiationRICOH KK·Filed 2004·Granted Nov 21, 2006·8 cites·8 claims
Showing the top 50 of 204 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →