Inventor · disambiguated record
Takashi Kajimura
Also filed as: KAJIMURA TAKASHI
31 granted patents·569 citations·filing 1977–1993
97Inventor score
Files withHITACHI LTD31
Top patents by PatentIndex Score
31 records- 0196US4961197ASemiconductor laser deviceHITACHI LTD·Filed 1989·Granted Oct 2, 1990·77 cites·27 claims
- 0295US4503540APhase-locked semiconductor laser deviceHITACHI LTD·Filed 1982·Granted Mar 5, 1985·58 cites·4 claims
- 0394US4337443ASemiconductor laser device with facet passivation filmHITACHI LTD·Filed 1980·Granted Jun 29, 1982·53 cites·9 claims
- 0488US4176325ASemiconductor laser deviceHITACHI LTD·Filed 1977·Granted Nov 27, 1979·34 cites·22 claims
- 0586US4369513ASemiconductor laser deviceHITACHI LTD·Filed 1980·Granted Jan 18, 1983·32 cites·6 claims
- 0684US4599729ASemiconductor laser device having facets provided with dielectric layersHITACHI LTD·Filed 1984·Granted Jul 8, 1986·28 cites·14 claims
- 0776US4740976ASemiconductor laser deviceHITACHI LTD·Filed 1984·Granted Apr 26, 1988·22 cites·13 claims
- 0876US4432091ASemiconductor laser deviceHITACHI LTD·Filed 1982·Granted Feb 14, 1984·20 cites·3 claims
- 0973US4881235ASemiconductor laser having a multiple quantum well structure doped with impuritiesHITACHI LTD·Filed 1987·Granted Nov 14, 1989·21 cites·40 claims
- 1069US4827483ASemiconductor laser device and method of fabricating the sameHITACHI LTD·Filed 1986·Granted May 2, 1989·19 cites·28 claims
- 1169US4288757ASemiconductor laser deviceHITACHI LTD·Filed 1979·Granted Sep 8, 1981·17 cites·6 claims
- 1268US4881238ASemiconductor laser having quantum well active region doped with impuritiesHITACHI LTD·Filed 1986·Granted Nov 14, 1989·17 cites·51 claims
- 1364US4509173APhase-locked semiconductor laser deviceHITACHI LTD·Filed 1982·Granted Apr 2, 1985·14 cites·12 claims
- 1462US4794606AOpto-electronic deviceHITACHI LTD·Filed 1988·Granted Dec 27, 1988·13 cites·11 claims
- 1561US4841531ASemiconductor laser deviceHITACHI LTD·Filed 1988·Granted Jun 20, 1989·13 cites·3 claims
- 1661US4780879ASemiconductor laser device having little astigmatismHITACHI LTD·Filed 1987·Granted Oct 25, 1988·14 cites·23 claims
- 1761US4752934AMulti quantum well laser with parallel injectionHITACHI LTD·Filed 1986·Granted Jun 21, 1988·13 cites·28 claims
- 1858US4630279ABuried heterojunction laserHITACHI LTD·Filed 1983·Granted Dec 16, 1986·11 cites·19 claims
- 1958US4602371AHigh output semiconductor laser device utilizing a mesa-stripe optical confinement regionHITACHI LTD·Filed 1984·Granted Jul 22, 1986·11 cites·24 claims
- 2050US4800565ASemiconductor laser device having high optical intensity and reliabilityHITACHI LTD·Filed 1987·Granted Jan 24, 1989·9 cites·9 claims
- 2149US5136601ASemiconductor laserHITACHI LTD·Filed 1989·Granted Aug 4, 1992·8 cites·3 claims
- 2248US4811354ASemiconductor laserHITACHI LTD·Filed 1986·Granted Mar 7, 1989·8 cites·30 claims
- 2345US5300793AHetero crystalline structure and semiconductor device using itHITACHI LTD·Filed 1993·Granted Apr 5, 1994·16 cites·21 claims
- 2445US4752933ASemiconductor laserHITACHI LTD·Filed 1986·Granted Jun 21, 1988·6 cites·16 claims
- 2544US4426703ASemiconductor laser deviceHITACHI LTD·Filed 1981·Granted Jan 17, 1984·7 cites·8 claims
- 2643US4797891ASemiconductor laserHITACHI LTD·Filed 1986·Granted Jan 10, 1989·6 cites·22 claims
- 2741US4872175ASemiconductor laser device having a lens-like refractive index distribution within the stripeHITACHI LTD·Filed 1988·Granted Oct 3, 1989·5 cites·19 claims
- 2841US4783425AFabrication process of semiconductor lasersHITACHI LTD·Filed 1986·Granted Nov 8, 1988·7 cites·26 claims
- 2938US5042046ASemiconductor laser deviceHITACHI LTD·Filed 1990·Granted Aug 20, 1991·6 cites·31 claims
- 3035US4563764ASemiconductor laser deviceHITACHI LTD·Filed 1983·Granted Jan 7, 1986·3 cites·6 claims
- 3131US4821275ALaser diodeHITACHI LTD·Filed 1988·Granted Apr 11, 1989·1 cites·24 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →