Inventor

Shigeyuki Akiba

Inventor

Tokyo, JP

Overview

1979–2005

Patent span

Electricity

Primary field (CPC H)

Patents· 83 as inventor

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

H04Bprimary

H04BTransmission27%

H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light25%

H04JMultiplex communication11%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein8%

G02BOptical elements, systems or apparatus7%

H10FInorganic semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation6%

B82YSpecific uses or applications of nanostructures4%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests4%

Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution2%

G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices2%

PatentTitleYear

6,867,908'Optical amplifier having various control circuitry'2005 6,614,588'Optical amplifier having various control circuitry'2003 6,556,325'Optical repeater monitoring system and a method thereof'2003 6,188,508'Control signal superimposer'2001 6,188,510'Optical amplifying transmission system and optical amplifying repeater'2001 6,181,449'Wavelength division multiplexed optical processing device and optical communication transmission path'2001 6,160,649'Optical power measuring system terminal station and repeater therefor'2000 6,091,538'Gain equalizing apparatus'2000 6,021,235'Wavelength-division multiplexing optical transmission system'2000 6,005,702'Optical transmission device, WDM optical transmission apparatus, and optical transmission system using return-to-zero optical pulses'1999 5,978,529'Gain equalizer and optical amplifying transmission line'1999 5,966,228'Optical transmission system and optical repeater'1999 5,937,126'Optically amplifying/repeating transmission system and optical amplifier'1999 5,926,300'Optical add-drop multiplexer'1999 5,920,413'Method and device for optical add/drop multiplexing using high speed polarization scrambler'1999 5,912,750'Optical transmission line'1999 5,898,714'Optical pulse generator'1999 5,892,608'Optical receiver device for dark soliton lightwave'1999 5,889,607'Optical modulator, optical short pulse generating device, optical waveform shaping device, and optical demultiplexer device'1999 5,883,734'Optical switch with reduced polarization dependency and no waveform deformation and frequency shift'1999 5,877,878'Surveillance method of optical amplifier-repeater transmission system'1999 5,872,647'Optical transmitting terminal'1999 5,864,421'Optical frequency shifter and optical soliton-like return-to-zero pulse transmission system using optical frequency shifter'1999 5,822,095'Optical add-drop multiplexer'1998 5,808,789'Optically amplifying transmission system'1998 5,790,289'WDM optical communication method with pre-emphasis technique and an apparatus therefor'1998 5,790,294'Line monitoring method and line monitoring apparatus'1998 5,786,918'Optical communication system and optical transmitting device'1998 5,771,255'Laser light generator'1998 5,737,110'Optical communication system using dark soliton lightwave'1998 5,710,660'Gain-controllable optical amplifier and optical gain-control method'1998 5,642,215'Optical transmission system'1997 5,629,795'Optical amplifying-repeating transmission system'1997 5,625,479'Soliton optical communication system and optical transmitter and optical receiver therefor'1997 5,589,969'Wavelength division multiplexed optical fiber transmission equipment'1996 5,585,954'Apparatus for measuring optical transmission characteristic'1996 5,574,590'Optical amplifying transmitting system'1996 5,559,910'Wavelength division multiplexed optical fiber transmission equiptment'1996 5,539,557'Supervisory signal receiving method and apparatus'1996 5,510,930'Light amplifying apparatus'1996 5,430,795'Optical transmitter with the signal light of reduced degree of polarization and optical depolarizing circuit'1995 5,132,747'Avalanche photo diode'1992 5,122,844'Quantum well structure and semiconductor device using the same'1992 5,019,519'Method for the manufacture of optical semiconductor device'1991 4,991,921'Pn junction optical modulating device having a buffer layer with small energy gap'1991 4,946,243'Optical modulation element'1990 4,932,034'Distributed feedback semiconductor laser device and current injection'1990 4,918,496'Infrared emitting device with dislocation free layer'1990 4,913,506'Optical modulation device'1990 4,897,845'Semiconductor optical amplifying element'1990 4,874,216'Variable-waveguide optical branching filter'1989 4,837,526'Semiconductor external optical modulator'1989 4,826,291'Method for manufacturing diffraction grating'1989 4,820,655'Method for manufacturing semiconductor optical integrated device with optical waveguide regions'1989 4,815,090'Distributed feedback semiconductor laser with monitor'1989 4,811,353'Semiconductor optical modulator'1989 4,811,352'Semiconductor integrated light emitting device'1989 4,796,274'Semiconductor device with distributed bragg reflector'1989 4,788,690'Distributed feedback semiconductor laser with monitor'1988 4,773,075'Light emitting device'1988 4,761,383'Method of manufacturing avalanche photo diode'1988 4,743,087'Optical external modulation semiconductor element'1988 4,731,641'Avalanche photo diode with quantum well layer'1988 4,720,835'Integrated semiconductor light emitting element with oscillation wavelength and phase modulated light output'1988 4,701,930'Distributed feedback semiconductor laser'1987 4,682,196'Multi-layered semi-conductor photodetector'1987 4,665,527'Distributed feedback semiconductor laser'1987 4,660,934'Method for manufacturing diffraction grating'1987 4,653,058'Distributed feedback semiconductor laser with monitor'1987 4,653,059'Distributed feedback semiconductor laser'1987 4,648,096'Distributed feedback semiconductor laser'1987 4,633,474'Distributed feedback semiconductor laser'1986 4,589,117'Butt-jointed built-in semiconductor laser'1986 4,573,158'Distributed feedback semiconductor laser'1986 4,573,161'Semiconductor laser'1986 4,553,239'Distributed feedback semiconductor laser'1985 4,516,243'Distributed feedback semiconductor laser'1985 4,506,367'Distributed feedback semiconductor laser'1985 4,456,998'Semiconductor laser'1984 4,383,266'Avalanche photo diode'1983 4,340,966'Semiconductor laser with buffer layer'1982 4,274,103'Avalanche photodiode with semiconductor hetero structure'1981 4,179,317'Method for producing compound semiconductor crystals'1979

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1979–2001Patents assigned to KOKUSAI DENSHIN DENWA CO LTD (76)· patent assignee history

1979–1981Based in Tanashi, JP· patent location history

1982–2001Based in Tokyo, JP· patent location history

1996–2005Patents assigned to MITSUBISHI ELECTRIC CORP (4)· patent assignee history

1996–2003Based in Kamifukuoka, JP· patent location history

1998Patents assigned to KUKUSAI DENSHIN DENWA KABUSHIK (1)· patent assignee history

1999–2005Patents assigned to KDD SUBMARINE CABLE SYS INC (5)· patent assignee history

2001–2005Patents assigned to KDD CORP (5)· patent assignee history

2003–2005Based in Saitama, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
KOKUSAI DENSHIN DENWA CO LTD	76	1979–2001
KDD CORP	5	2001–2005
KDD SUBMARINE CABLE SYS INC	5	1999–2005
MITSUBISHI ELECTRIC CORP	4	1996–2005
KUKUSAI DENSHIN DENWA KABUSHIK	1	1998

Locations

Location	Patents	Span
Tokyo, JP	76	1982–2001
Kamifukuoka, JP	3	1996–2003
Saitama, JP	2	2003–2005
Tanashi, JP	2	1979–1981