Inventor · disambiguated record
Tsukuru Ohtoshi
Also filed as: OHTOSHI TSUKURU
24 granted patents·2 pending applications·706 citations·filing 1983–2013
96Inventor score
Top patents by PatentIndex Score
26 records- 0197US6639925B2Optical information processing equipment and semiconductor light emitting device suitable thereforHITACHI INC·Filed 2001·Granted Oct 28, 2003·285 cites·9 claims
- 0292US5119393ASemiconductor laser device capable of controlling wavelength shiftHITACHI LTD·Filed 1990·Granted Jun 2, 1992·81 cites·21 claims
- 0386US6635908B2Burying type avalanche photodiode and fabrication method thereofHITACHI LTD·Filed 2001·Granted Oct 21, 2003·43 cites·16 claims
- 0486US5177758ASemiconductor laser device with plural active layers and changing optical propertiesHITACHI LTD·Filed 1991·Granted Jan 5, 1993·54 cites·36 claims
- 0577US6542526B1Optical information processor and semiconductor light emitting device suitable for the sameHITACHI LTD·Filed 1997·Granted Apr 1, 2003·40 cites·4 claims
- 0673US4881235ASemiconductor laser having a multiple quantum well structure doped with impuritiesHITACHI LTD·Filed 1987·Granted Nov 14, 1989·21 cites·40 claims
- 0771US5132981ASemiconductor optical deviceHITACHI LTD·Filed 1990·Granted Jul 21, 1992·31 cites·22 claims
- 0871US4835578ASemiconductor device having a quantum wire and a method of producing the sameHITACHI LTD·Filed 1987·Granted May 30, 1989·26 cites·7 claims
- 0969US8449160B2Multi-wavelength light emitting deviceTANAKA KENICHI·Filed 2010·Granted May 28, 2013·2 cites·9 claims
- 1064US8369913B2Optical measurement instrument for living body semiconductor laser installation for living body light measuring deviceHITACHI LTD·Filed 2007·Granted Feb 5, 2013·3 cites·13 claims
- 1161US5543629ASuperlattice avalanche photodiode (APD)HITACHI LTD·Filed 1995·Granted Aug 6, 1996·30 cites·24 claims
- 1258US4602371AHigh output semiconductor laser device utilizing a mesa-stripe optical confinement regionHITACHI LTD·Filed 1984·Granted Jul 22, 1986·11 cites·24 claims
- 1357US5299217ASemiconductor light-emitting device with cadmium zinc selenide layerHITACHI LTD·Filed 1991·Granted Mar 29, 1994·16 cites·29 claims
- 1457US5042049ASemiconductor optical deviceHITACHI LTD·Filed 1990·Granted Aug 20, 1991·19 cites·16 claims
- 1554US7038233B2Semiconductor optical devices and optical modulesOPNEXT JAPAN INC·Filed 2004·Granted May 2, 2006·3 cites·14 claims
- 1651US8390549B2Organic luminescent display deviceISHIHARA SHINGO·Filed 2009·Granted Mar 5, 2013·0 cites·12 claims
- 1751US7668217B2Semiconductor laser diode deviceHITACHI LTD·Filed 2007·Granted Feb 23, 2010·0 cites·1 claims
- 1849US5136601ASemiconductor laserHITACHI LTD·Filed 1989·Granted Aug 4, 1992·8 cites·3 claims
- 1948US5324959ASemiconductor optical device having a heterointerface thereinHITACHI LTD·Filed 1992·Granted Jun 28, 1994·14 cites·12 claims
- 2048US5073892ASemiconductor laser deviceHITACHI LTD·Filed 1990·Granted Dec 17, 1991·11 cites·21 claims
- 2143US7738521B2Semiconductor laser deviceOPNEXT JAPAN INC·Filed 2006·Granted Jun 15, 2010·0 cites·10 claims
- 2242US7542498B2Semiconductor laser diodeOPNEXT JAPAN INC·Filed 2005·Granted Jun 2, 2009·0 cites·18 claims
- 2341US2010111126A1Semiconductor lasersSHIMIZU JUNICHIRO·Filed 2009·Application pending·0 cites
- 2440US2016013327A1Nitride semiconductor diodeHITACHI LTD·Filed 2013·Application pending·0 cites
- 2536US5170404ASemiconductor laser device suitable for optical communications systems driveHITACHI LTD·Filed 1990·Granted Dec 8, 1992·5 cites·21 claims
- 2635US4563764ASemiconductor laser deviceHITACHI LTD·Filed 1983·Granted Jan 7, 1986·3 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →