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Inventor

Akira Nagayama

Inventor
Tokyo, JP

Overview

18→
Patents
1980–2013
Patent span
Electricity
Primary field (CPC H)

Patents· 18 as inventor

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

H03Fprimary
H03FAmplifiers30%
G02BOptical elements, systems or apparatus15%
H04BTransmission11%
B24BMachines, devices, or processes for grinding or polishing4%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein4%
G05BControl or regulating systems in general4%
G06GAnalogue computers4%
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light4%
H02PControl or regulation of electric motors, electric generators or dynamo-electric converters4%
H03GControl of amplification4%
PatentTitleYear
8,463,202'Power amplifying circuit, and transmitter and wireless communication device using the same'20138,457,565'Power amplifier circuit, and transmitter and wireless communication device using the same'20138,396,435'Adder, and power combiner, quadrature modulator, quadrature demodulator, power amplifier, transmitter and wireless communicator using same'20138,351,881'Addition circuit, power amplifier circuit using same, and transmission device and communication device using the power amplifier circuit'20138,344,781'Power amplification device, and transmission device and communication device using same'20138,290,454'Power amplification device, and transmission device and communication device both using thereof'20128,207,774'Power amplification device and communication device'20128,145,067'Optical transmitter'20128,013,652'Power amplification device and communication device'20117,630,651'Method and apparatus for controlling bias point of optical transmitter'20097,358,712'Power supply control circuit and control method thereof'20087,027,730'Method for measuring transmission loss in optical transmission line for test, and slave station, master station, and optical communication system using the method'20066,091,747'Circuit and method for driving laser diode'20005,770,001'Automatic assembly and inspection system for optical connector'19985,503,590'Polishing plate for optical fiber connector ferrule end face and polishing apparatus therefor'19965,436,995'Optical fiber connector unit and optical fiber connector'19955,204,921'Automated optical main distributing frame system'19934,207,506'Servo system with reduction of transient error and settling time'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1980–1998Patents assigned to NIPPON TELEGRAPH & TELEPHONE (5)· patent assignee history
1980–2013Based in Tokyo, JP· patent location history
2000–2012Patents assigned to FUJITSU LTD (5)· patent assignee history
2000–2006Based in Sapporo, JP· patent location history
2008Based in Yokohama, JP· patent location history
2009–2012Based in Kawasaki, JP· patent location history
2011–2013Patents assigned to KYOCERA CORP (8)· patent assignee history
2012–2013Patents assigned to NAGAYAMA AKIRA (8)· patent assignee history
2012–2013Patents assigned to FUKUOKA YASUHIKO (4)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
KYOCERA CORP82011–2013
NAGAYAMA AKIRAself82012–2013
FUJITSU LTD52000–2012
NIPPON TELEGRAPH & TELEPHONE51980–1998
FUKUOKA YASUHIKO42012–2013
Locations
LocationPatentsSpan
Tokyo, JP131980–2013
Kawasaki, JP22009–2012
Sapporo, JP22000–2006
Yokohama, JP12008