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Yoshihito Onoda
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Kawasaki-shi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Optical amplifier and an optical amplification method
Patent number
RE44881
Issue date
May 6, 2014
Fujitsu Limited
Hideaki Sugiya
359 - Optical: systems and elements
Information
Patent Grant
Optical amplifier
Patent number
7,236,294
Issue date
Jun 26, 2007
Fujitsu Limited
Tomoaki Takeyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier for amplifying multi-wavelength light
Patent number
6,738,184
Issue date
May 18, 2004
Fujitsu Limited
Etsuko Hayashi
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Optical amplifying apparatus, wide-band optical amplifying apparatu...
Patent number
6,411,429
Issue date
Jun 25, 2002
Fujitsu Limited
Hiroaki Tomofuji
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier and an optical amplification method
Patent number
6,373,624
Issue date
Apr 16, 2002
Fujitsu Limited
Hideaki Sugiya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier and an optical amplification method
Patent number
6,304,371
Issue date
Oct 16, 2001
Fujitsu Limited
Hideaki Sugiya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier and an optical amplification method
Patent number
6,118,576
Issue date
Sep 12, 2000
Fujitsu Limited
Hideaki Sugiya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier and system including the same
Patent number
6,111,688
Issue date
Aug 29, 2000
Fujitsu Limited
Taiki Kobayashi
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Bidirectional optical amplifier circuit
Patent number
5,875,054
Issue date
Feb 23, 1999
Fujitsu Limited
Yoshihito Onoda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Control apparatus for optical amplifier
Patent number
5,822,112
Issue date
Oct 13, 1998
Fujitsu Limited
Hiroyuki Itou
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Receiver for coherent optical communication
Patent number
5,115,332
Issue date
May 19, 1992
Fujitsu Limited
Takao Naito
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Heterodyne receiver for coherent optical communication
Patent number
5,052,051
Issue date
Sep 24, 1991
Fujitsu Limited
Takao Naito
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Direct modulation phase-shift-keying system and method
Patent number
5,050,176
Issue date
Sep 17, 1991
Fujitsu Limited
Takao Naito
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Polarization diversity optical receiver for coherent optical commun...
Patent number
4,965,858
Issue date
Oct 23, 1990
Fujitsu Limited
Takao Naito
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
Optical amplifier
Publication number
20050146782
Publication date
Jul 7, 2005
FUJITSU LIMITED
Tomoaki Takeyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical amplifier for amplifying multi-wavelength light
Publication number
20020101652
Publication date
Aug 1, 2002
FUJITSU LIMITED
Etsuko Hayashi
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Optical amplifier and an optical amplification method
Publication number
20020024725
Publication date
Feb 28, 2002
FUJITSU LIMITED
Hideaki Sugiya
H01 - BASIC ELECTRIC ELEMENTS