Inventor · disambiguated record
Hirohito Yamada
Also filed as: YAMADA HIROHITO
20 granted patents·2 pending applications·298 citations·filing 1993–2023
95Inventor score
Top patents by PatentIndex Score
22 records- 0189US6363097B1Semiconductor laser with a rewritable wavelength stabilizerNEC CORP·Filed 1998·Granted Mar 26, 2002·85 cites·31 claims
- 0286US6416575B2Photonic crystal multilayer substrate and manufacturing method thereofNEC CORP·Filed 2001·Granted Jul 9, 2002·38 cites·16 claims
- 0381US6631236B2Photonic crystal waveguide and directional coupler using the sameNEC CORP·Filed 2001·Granted Oct 7, 2003·25 cites·49 claims
- 0478US8374469B2Optical waveguideNEC CORP·Filed 2007·Granted Feb 12, 2013·6 cites·7 claims
- 0577US7715665B2Photonic crystal optical circuit and method for controlling the sameNEC CORP·Filed 2008·Granted May 11, 2010·4 cites·10 claims
- 0675US5394429ADistributed-feedback laser with improved analog modulation distortion characteristics and method for fabricating the sameNEC CORP·Filed 1993·Granted Feb 28, 1995·32 cites·8 claims
- 0767US8494023B2Composite optical waveguide, variable-wavelength laser, and method of oscillating laserYAMAZAKI HIROYUKI·Filed 2011·Granted Jul 23, 2013·2 cites·14 claims
- 0867US7286738B2White light pulse generating method using nonlinear optical deviceNEC CORP·Filed 2005·Granted Oct 23, 2007·4 cites·22 claims
- 0963US7376317B2Waveguide structure and method of manufacturing the sameNEC CORP·Filed 2004·Granted May 20, 2008·8 cites·10 claims
- 1059US12424848B2Power systemUNIV TOHOKU·Filed 2023·Granted Sep 23, 2025·0 cites·8 claims
- 1158US7359606B2Photonic crystal optical circuit and method for controlling the sameNEC CORP·Filed 2003·Granted Apr 15, 2008·5 cites·10 claims
- 1255US5887012ASemiconductor laser arrayNEC CORP·Filed 1996·Granted Mar 23, 1999·19 cites·5 claims
- 1352US6541951B2Optical measurement of target-light waveformNEC CORP·Filed 2001·Granted Apr 1, 2003·3 cites·36 claims
- 1451US5511089ASemiconductor laser element with excellent high-temperature characteristic and capable of being readily mounted on an optical circuit boardNEC CORP·Filed 1994·Granted Apr 23, 1996·14 cites·14 claims
- 1545US5469459ALaser diode element with excellent intermodulation distortion characteristicNEC CORP·Filed 1994·Granted Nov 21, 1995·8 cites·12 claims
- 1644US5693965ALaser diode having narrowed radiation angle characteristicNEC CORP·Filed 1996·Granted Dec 2, 1997·11 cites·5 claims
- 1744US5568505ALaser diode element with excellent intermodulation distortion characteristicNEC CORP·Filed 1995·Granted Oct 22, 1996·10 cites·4 claims
- 1844US2024405542A1Autonomous Cooperative Control System and Autonomous Cooperative Control MethodUNIV TOHOKU·Filed 2021·Application pending·0 cites
- 1943US5828058AOptical fiber remote sensing system with electromagnetic wave measurementNEC CORP·Filed 1997·Granted Oct 27, 1998·10 cites·5 claims
- 2043US5661580ASCM type of optical signal transmission system without clipping distortionNEC CORP·Filed 1995·Granted Aug 26, 1997·11 cites·18 claims
- 2143US2009285522A1Optical waveguide, optical device, and optical communication deviceNEC CORP·Filed 2006·Application pending·0 cites
- 2232US5553090ASemiconductor multiquantum well structure and semiconductor laser therewithNEC CORP·Filed 1994·Granted Sep 3, 1996·3 cites·13 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →