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Yumiko Kawasaki
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Kawasaki-shi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Optical transmission system and dispersion compensator
Patent number
7,376,361
Issue date
May 20, 2008
Fujitsu Limited
Akira Miyauchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system using in-line amplifiers
Patent number
7,263,296
Issue date
Aug 28, 2007
Fujitsu Limited
Akira Miyauchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system and dispersion compensator
Patent number
7,116,913
Issue date
Oct 3, 2006
Fujitsu Limited
Akira Miyauchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system using in-line amplifiers
Patent number
7,116,918
Issue date
Oct 3, 2006
Fujitsu Limited
Akira Miyauchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Wavelength multiplexing transmission apparatus and wavelength demul...
Patent number
7,079,771
Issue date
Jul 18, 2006
Fujitsu Limited
Kazuo Yamane
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method and system for optical transmission adopting dispersion comp...
Patent number
7,068,876
Issue date
Jun 27, 2006
Fujitsu Limited
Takashi Tsuda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method for optical fiber communication, and device and system for u...
Patent number
7,006,769
Issue date
Feb 28, 2006
Fujitsu Limited
Yumiko Kawasaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system and dispersion compensator
Patent number
6,823,141
Issue date
Nov 23, 2004
Fujitsu Limited
Akira Miyauchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method for optical fiber communication, and terminal device and sys...
Patent number
6,738,584
Issue date
May 18, 2004
Fujitsu Ltd.
Takashi Tsuda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system using in-line amplifiers
Patent number
6,570,691
Issue date
May 27, 2003
Fujitsu Limited
Akira Miyauchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Wavelength multiplexing transmission apparatus and wavelength demul...
Patent number
6,496,288
Issue date
Dec 17, 2002
Fujitsu Limited
Kazuo Yamane
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission device and optical communication system
Patent number
6,449,074
Issue date
Sep 10, 2002
Fujitsu Limited
Satoru Okano
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Wavelength multiplexing transmission apparatus and wavelength demul...
Patent number
6,295,147
Issue date
Sep 25, 2001
Fujitsu Limited
Kazuo Yamane
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier and optical communication system having the optic...
Patent number
6,288,836
Issue date
Sep 11, 2001
Fujitsu Limited
Yumiko Kawasaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Wavelength-division-multiplexing optical amplifier
Patent number
6,061,173
Issue date
May 9, 2000
Fujitsu Limited
Kazuo Yamane
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier and optical transmission system including the opt...
Patent number
6,038,063
Issue date
Mar 14, 2000
Fujitsu Limited
Takashi Tsuda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system
Patent number
5,877,881
Issue date
Mar 2, 1999
Fujitsu Ltd.
Akira Miyauchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Auxiliary-signal transmission system
Patent number
5,841,558
Issue date
Nov 24, 1998
Fujitsu Limited
Yuji Tamura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Auxiliary-signal transmission system
Patent number
5,798,857
Issue date
Aug 25, 1998
Fujitsu Limited
Yuji Tamura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Wavelength-division-multiplexing optical amplifier
Patent number
5,764,404
Issue date
Jun 9, 1998
Fujitsu Limited
Kazuo Yamane
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier and optical transmission apparatus
Patent number
5,680,246
Issue date
Oct 21, 1997
Fujitsu Limited
Tsukasa Takahashi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Auxiliary-signal transmission system
Patent number
5,625,481
Issue date
Apr 29, 1997
Fujitsu Limited
Yuji Tamura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
Optical transmission system and dispersion compensator
Publication number
20070014578
Publication date
Jan 18, 2007
FUJITSU LIMITED
Akira Miyauchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical transmission system using in-line amplifiers
Publication number
20060285856
Publication date
Dec 21, 2006
FUJITSU LIMITED
Akira Miyauchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical transmission system and dispersion compensator
Publication number
20050047792
Publication date
Mar 3, 2005
FUJITSU LIMITED
Akira Miyauchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical transmission system using in-line amplifiers
Publication number
20030194242
Publication date
Oct 16, 2003
FUJITSU LIMITED
Akira Miyauchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Wavelength multiplexing transmission apparatus and wavelength demul...
Publication number
20030030867
Publication date
Feb 13, 2003
FUJITSU LIMITED
Kazuo Yamane
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION DEVICE AND OPTICAL COMMUNICATION SYSTEM
Publication number
20020093705
Publication date
Jul 18, 2002
FUJITSU LIMITED
SATORU OKANO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Wavelength multiplexing transmission apparatus and wavelength demul...
Publication number
20010050792
Publication date
Dec 13, 2001
FUJITSU LIMITED
Kazuo Yamane
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical transmission system and dispersion compensator
Publication number
20010015843
Publication date
Aug 23, 2001
Akira Miyauchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE