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Inventor

Yuichi Matsushima

Inventor
Tokorozawa, JP

Overview

49→
Patents
1983–2021
Patent span
Electricity
Primary field (CPC H)

Patents· 49 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H01Sprimary
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light25%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein19%
B82YSpecific uses or applications of nanostructures13%
G02BOptical elements, systems or apparatus9%
H10FInorganic semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation9%
H04BTransmission4%
H10DInorganic electric semiconductor devices3%
H10HInorganic light-emitting semiconductor devices having potential barriers3%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution3%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests3%
PatentTitleYear
11,133,136Switch20216,327,404'Wavelength filter'20016,147,901'Semiconductor memory operating electrically and optically, retaining information without power supply'20006,091,536'Optical processing device'20006,084,997'Coupled waveguide structure'20005,952,683'Functional semiconductor element with avalanche multiplication'19995,912,911'Optical short pulse reshaping device'19995,859,941'Optical add/drop multiplexer device'19995,805,327'Reshaping device for optical short pulses'19985,798,856'Optical pulse generator'19985,729,378'Optical device'19985,663,572'Optical functional semiconductor element'19975,434,693'Optical short pulse generating device'19955,401,957'Optical waveform shaping device for peforming waveform equalization and timing synchronization'19955,394,260'Optical pulse generator'19955,392,306'Multiple quantum well structure and semiconductor device using the same'19955,359,679'Optical modulator'19945,315,422'Optical Mach-Zehnder type logic element which performs an XOR operation'19945,306,924'Semiconductor device with strained-layer superlattice'19945,187,717'Tunable semiconductor laser'19935,132,747'Avalanche photo diode'19925,122,844'Quantum well structure and semiconductor device using the same'19924,991,921'Pn junction optical modulating device having a buffer layer with small energy gap'19914,932,034'Distributed feedback semiconductor laser device and current injection'19904,918,496'Infrared emitting device with dislocation free layer'19904,897,845'Semiconductor optical amplifying element'19904,892,832'Filter bag for microbiological examination'19904,874,216'Variable-waveguide optical branching filter'19894,852,108'Wavelength tunable semiconductor laser with narrow band-pass active filter region'19894,826,291'Method for manufacturing diffraction grating'19894,815,090'Distributed feedback semiconductor laser with monitor'19894,805,975'Optical waveguide switch'19894,795,225'Semiconductor optical switch'19894,761,383'Method of manufacturing avalanche photo diode'19884,731,641'Avalanche photo diode with quantum well layer'19884,729,004'Semiconductor photo device'19884,701,930'Distributed feedback semiconductor laser'19874,682,196'Multi-layered semi-conductor photodetector'19874,665,527'Distributed feedback semiconductor laser'19874,660,934'Method for manufacturing diffraction grating'19874,653,058'Distributed feedback semiconductor laser with monitor'19874,653,059'Distributed feedback semiconductor laser'19874,648,096'Distributed feedback semiconductor laser'19874,633,474'Distributed feedback semiconductor laser'19864,589,117'Butt-jointed built-in semiconductor laser'19864,573,161'Semiconductor laser'19864,553,239'Distributed feedback semiconductor laser'19854,506,367'Distributed feedback semiconductor laser'19854,383,266'Avalanche photo diode'1983

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1983–2000Patents assigned to KOKUSAI DENSHIN DENWA CO LTD (43)· patent assignee history
1983–2000Based in Tokorozawa, JP· patent location history
1986–1992Based in Tanashi, JP· patent location history
1990–2000Based in Tokyo, JP· patent location history
1998Patents assigned to KOKUSAI DENSIN DENWA KABUSIKI (1)· patent assignee history
2000–2001Patents assigned to KDD CORP (3)· patent assignee history
2001Patents assigned to SUBMARINE CABLE SYSTEMS INC (1)· patent assignee history
2001Based in Kamifukuoka, JP· patent location history
2021Patents assigned to FUJIKURA LTD (1)· patent assignee history
2021Based in Chiba, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
KOKUSAI DENSHIN DENWA CO LTD431983–2000
KDD CORP32000–2001
FUJIKURA LTD12021
KOKUSAI DENSIN DENWA KABUSIKI11998
SUBMARINE CABLE SYSTEMS INC12001
Locations
LocationPatentsSpan
Tokorozawa, JP251983–2000
Tanashi, JP161986–1992
Tokyo, JP51990–2000
Chiba, JP12021
Kamifukuoka, JP12001