Inventor
Haruhiko Kuwatsuka
Inventor
Kawasaki, JP
Overview
Patents· 16 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H10Fprimary
H10FInorganic semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation23%
G02BOptical elements, systems or apparatus17%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein17%
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light17%
H04BTransmission10%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution10%
G01JMeasurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light3%
H01LSemiconductor devices3%
PatentTitleYear
10,901,242Driving device and driving method for phase controller, and optical switch20219,819,149'Optical transmitter implementing wavelength tunable diode'20179,444,221'Laser apparatus and method to re-tune emission wavelength tunable LD'20169,395,504'System to control wavelength and method to control wavelength'20169,276,162'Semiconductor photodetector and method for manufacturing the same'20168,772,896'Semiconductor photodetector that causes avalanche multiplication to occur only at photodetector portion located at central portion of mesa structure'20148,031,394'Wavelength conversion system, optical integrated device and wavelength conversion method'20117,875,946'Semiconductor photodetector that causes avalanche multiplication to occur only at photodetector portion located at central portion of mesa structure'20117,507,600'Semiconductor photodetecting device and method for fabricating the same'20097,436,586'Wavelength conversion system, optical integrated device and wavelength conversion method'20087,295,366'Optical integrated device and optical module'20076,943,422'Semiconductor photodetecting device and method for fabricating the same'20056,885,039'Semiconductor photodetector and avalanche photodiode'20056,542,286'Wavelength converting device and converting method'20035,751,758'Phase conjugate wave generating device, wavelength converting method, optical dispersion compensating method and multi-wavelength light generating device'19984,984,032'Semiconductor photodiode'1991Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1991–2016Patents assigned to FUJITSU LTD (12)· patent assignee history
1991Based in Yokohama, JP· patent location history
1998Based in Kanagawa, JP· patent location history
2003–2016Based in Kawasaki, JP· patent location history
2011Patents assigned to EUDYNA DEVICES INC (1)· patent assignee history
2014–2016Patents assigned to SEDI INC (2)· patent assignee history
2016–2017Patents assigned to SUMITOMO ELECTRIC INDUSTRIES (3)· patent assignee history
2016–2021Based in Tsukuba, JP· patent location history
2017–2021Patents assigned to AIST (2)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| FUJITSU LTD | 12 | 1991–2016 |
| SUMITOMO ELECTRIC INDUSTRIES | 3 | 2016–2017 |
| AIST | 2 | 2017–2021 |
| SEDI INC | 2 | 2014–2016 |
| EUDYNA DEVICES INC | 1 | 2011 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kawasaki, JP | 10 | 2003–2016 |
| Tsukuba, JP | 4 | 2016–2021 |
| Kanagawa, JP | 1 | 1998 |
| Yokohama, JP | 1 | 1991 |