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Kawasaki, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Optical transmission system, optical transmission apparatus and tra...
Patent number
11,063,684
Issue date
Jul 13, 2021
Fujitsu Limited
Ryo Karube
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Raman fiber amplifier and its control via path switching
Patent number
9,042,005
Issue date
May 26, 2015
Fujitsu Limited
Shinichirou Muro
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier
Patent number
8,379,299
Issue date
Feb 19, 2013
Fujitsu Limited
Tomoaki Takeyama
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Optical amplifier
Patent number
8,174,758
Issue date
May 8, 2012
Fujitsu Limited
Shinichirou Muro
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Optical transmission apparatus and optical attenuation amount contr...
Patent number
8,116,626
Issue date
Feb 14, 2012
Fujitsu Limited
Tomoaki Takeyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier
Patent number
8,077,383
Issue date
Dec 13, 2011
Fujitsu Limited
Tomoaki Takeyama
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Photo-detecting apparatus and photo-detecting method
Patent number
8,026,538
Issue date
Sep 27, 2011
Fujitsu Limited
Tomoaki Takeyama
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Raman amplifier and excitation light source used thereof
Patent number
8,027,082
Issue date
Sep 27, 2011
Fujitsu Limited
Shinichirou Muro
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Optical transmission system
Patent number
7,990,608
Issue date
Aug 2, 2011
Fujitsu Limited
Tomoaki Takeyama
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Optical transmission apparatus and method of controlling the same
Patent number
7,813,642
Issue date
Oct 12, 2010
Fujitsu Limited
Shinichirou Muro
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier
Patent number
7,643,206
Issue date
Jan 5, 2010
Fujitsu Limited
Tomoaki Takeyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission apparatus
Patent number
7,616,848
Issue date
Nov 10, 2009
Fujitsu Limited
Tomoaki Takeyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplification characteristics simulation apparatus and opti...
Patent number
7,551,347
Issue date
Jun 23, 2009
Fujitsu Limited
Etsuko Hayashi
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Optical amplifier provided with control function of pumping light,...
Patent number
7,505,197
Issue date
Mar 17, 2009
Fujitsu Limited
Yasushi Sugaya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier, optical amplification repeater and pump light su...
Patent number
7,400,441
Issue date
Jul 15, 2008
Fujitsu Limited
Shinichirou Muro
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Individual band gain equalizer for optical amplifiers
Patent number
7,359,112
Issue date
Apr 15, 2008
Fujitsu Limited
Masato Nishihara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Raman amplifier
Patent number
7,180,654
Issue date
Feb 20, 2007
Fujitsu Limited
Yasushi Sugaya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Control method of optical fiber amplifier and optical transmission...
Patent number
7,145,718
Issue date
Dec 5, 2006
Fujitsu Limited
Yasushi Sugaya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method and apparatus for measuring multi-path interference noise in...
Patent number
6,999,177
Issue date
Feb 14, 2006
Fujitsu Limited
Shinichirou Muro
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method and device for optical amplification
Patent number
6,823,107
Issue date
Nov 23, 2004
Fujitsu Limited
Shinichirou Muro
H01 - BASIC ELECTRIC ELEMENTS
Patents Applications
last 30 patents
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM, OPTICAL TRANSMISSION APPARATUS AND TRA...
Publication number
20190222345
Publication date
Jul 18, 2019
Fujitsu Limited
Ryo KARUBE
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
AMPLIFYING APPARATUS AND CONTROL METHOD
Publication number
20130329278
Publication date
Dec 12, 2013
Fujitsu Limited
Shinichirou MURO
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OPTICAL AMPLIFIER
Publication number
20100245988
Publication date
Sep 30, 2010
FUJITSU LIMITED
Tomoaki Takeyama
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Optical transmission apparatus and optical attenuation amount contr...
Publication number
20090297143
Publication date
Dec 3, 2009
FUJITSU LIMITED
Tomoaki Takeyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical amplifier provided with control function of pumping light,...
Publication number
20090219609
Publication date
Sep 3, 2009
FUJITSU LIMITED
Yasushi Sugaya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL AMPLIFIER
Publication number
20090213455
Publication date
Aug 27, 2009
FUJITSU LIMITED
Shinichirou MURO
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Photo-detecting apparatus and photo-detecting method
Publication number
20090206437
Publication date
Aug 20, 2009
FUJITSU LIMITED
Tomoaki Takeyama
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OPTICAL AMPLIFIER
Publication number
20080239467
Publication date
Oct 2, 2008
FUJITSU LIMITED
Tomoaki Takeyama
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
INDIVIDUAL BAND GAIN EQUALIZER FOR OPTICAL AMPLIFIERS
Publication number
20080239470
Publication date
Oct 2, 2008
FUJITSU LIMITED
Masato Nishihara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
RAMAN AMPLIFIER AND EXCITATION LIGHT SOURCE USED THEREOF
Publication number
20080158657
Publication date
Jul 3, 2008
FUJITSU LIMITED
Shinichirou Muro
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Optical amplification characteristics simulation apparatus and opti...
Publication number
20080088915
Publication date
Apr 17, 2008
FUJITSU LIMITED
Etsuko Hayashi
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OPTICAL TRANSMISSION APPARATUS AND METHOD OF CONTROLLING THE SAME
Publication number
20080080865
Publication date
Apr 3, 2008
FUJITSU LIMITED
Shinichirou Muro
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL AMPLIFIER AND METHOD OF CONTROLLING THE SAME
Publication number
20080074731
Publication date
Mar 27, 2008
FUJITSU LIMITED
Tomoaki Takeyama
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Optical transmission apparatus
Publication number
20070274725
Publication date
Nov 29, 2007
FUJITSU LIMITED
Tomoaki Takeyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL AMPLIFIER, OPTICAL AMPLIFICATION REPEATER AND PUMP LIGHT SU...
Publication number
20070268569
Publication date
Nov 22, 2007
FUJITSU LIMITED
Shinichirou Muro
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical amplifier
Publication number
20070229941
Publication date
Oct 4, 2007
FUJITSU LIMITED
Tomoaki Takeyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Control apparatus and method for optical amplifier, optical amplifi...
Publication number
20060203329
Publication date
Sep 14, 2006
FUJITSU LIMITED
Masato Nishihara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Control method of optical fiber amplifier and optical transmission...
Publication number
20050225843
Publication date
Oct 13, 2005
FUJITSU LIMITED
Yasushi Sugaya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical amplifier provided with control function of pumping light,...
Publication number
20040196158
Publication date
Oct 7, 2004
FUJITSU LIMITED
Yasushi Sugaya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Raman amplifier
Publication number
20040080812
Publication date
Apr 29, 2004
FUJITSU LIMITED
Yasushi Sugaya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Multi-path interference light measuring method and apparatus
Publication number
20030169427
Publication date
Sep 11, 2003
Shinichirou Muro
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Method and device for optical amplification
Publication number
20030063850
Publication date
Apr 3, 2003
FUJITSU LIMITED
Shinichirou Muro
H01 - BASIC ELECTRIC ELEMENTS