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Sapporo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Optical amplifier and control method for optical amplifier
Patent number
7,400,444
Issue date
Jul 15, 2008
Fujitsu Limited
Norifumi Shukunami
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Optical amplifier for wide band Raman amplification of wavelength d...
Patent number
7,394,589
Issue date
Jul 1, 2008
Fujitsu Limited
Miki Onaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier with pump light source control for Raman amplific...
Patent number
7,362,499
Issue date
Apr 22, 2008
Fujitsu Limited
Etsuko Hayashi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Raman optical amplifier, optical transmission system using the same...
Patent number
7,245,422
Issue date
Jul 17, 2007
Fujitsu Limited
Tomoto Tanaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Light amplification control unit and method
Patent number
7,133,192
Issue date
Nov 7, 2006
Fujitsu Limited
Tomoto Tanaka
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Optical amplifier with pump light source control for Raman amplific...
Patent number
7,042,636
Issue date
May 9, 2006
Fujitsu Limited
Etsuko Hayashi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier with pump light source control for Raman amplific...
Patent number
6,891,661
Issue date
May 10, 2005
Fujitsu Limited
Etsuko Hayashi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplification apparatus utilizing raman amplification and c...
Patent number
6,873,455
Issue date
Mar 29, 2005
Fujitsu Limited
Yasushi Sugaya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplification apparatus using Raman amplification
Patent number
6,847,478
Issue date
Jan 25, 2005
Fujitsu Limited
Tomoto Tanaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplification apparatus using Raman amplification
Patent number
6,683,712
Issue date
Jan 27, 2004
Fujitsu Limited
Tomoto Tanaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier with pump light source control for raman amplific...
Patent number
6,624,926
Issue date
Sep 23, 2003
Fujitsu Limited
Etsuko Hayashi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplification apparatus utilizing Raman amplification and c...
Patent number
6,577,437
Issue date
Jun 10, 2003
Fujitsu Limited
Yasushi Sugaya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier for wide band raman amplification of wavelength d...
Patent number
6,510,000
Issue date
Jan 21, 2003
Fujitsu Limited
Miki Onaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplification apparatus using Raman amplification
Patent number
6,441,951
Issue date
Aug 27, 2002
Fujitsu Limited
Tomoto Tanaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplification apparatus utilizing Raman amplification and c...
Patent number
6,388,801
Issue date
May 14, 2002
Fujitsu Limited
Yasushi Sugaya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
CONTROLLER FOR OPTICAL TRANSMISSION DEVICE
Publication number
20090123162
Publication date
May 14, 2009
FUJITSU LIMITED
Tomoto TANAKA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical amplifier with pump light source control for Raman amplific...
Publication number
20060152796
Publication date
Jul 13, 2006
FUJITSU LIMITED
Etsuko Hayashi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Raman optical amplifier, optical transmission system using the same...
Publication number
20050174630
Publication date
Aug 11, 2005
FUJITSU LIMITED
Tomoto Tanaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical amplifier and control method for optical amplifier
Publication number
20050105170
Publication date
May 19, 2005
FUJITSU LIMITED
Norifumi Shukunami
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Optical amplifier with pump light source control for Raman amplific...
Publication number
20050024714
Publication date
Feb 3, 2005
FUJITSU LIMITED
Etsuko Hayashi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Light amplification control unit and method
Publication number
20040190122
Publication date
Sep 30, 2004
FUJITSU LIMITED
Tomoto Tanaka
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Optical amplifier with pump light source control for Raman amplific...
Publication number
20040080813
Publication date
Apr 29, 2004
FUJITSU LIMITED
Etsuko Hayashi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical amplification apparatus utilizing raman amplification and c...
Publication number
20030193713
Publication date
Oct 16, 2003
FUJITSU LIMITED
Yasushi Sugaya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical amplifier for wide band Raman amplification of wavelength d...
Publication number
20030095323
Publication date
May 22, 2003
FUJITSU LIMITED
Miki Onaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical amplification apparatus using raman amplification
Publication number
20020181078
Publication date
Dec 5, 2002
FUJITSU LIMITED
Tomoto Tanaka
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Optical amplification apparatus utilizing raman amplification and c...
Publication number
20020176154
Publication date
Nov 28, 2002
FUJITSU LIMITED
Yasushi Sugaya
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Optical amplification apparatus using Raman amplification
Publication number
20020044336
Publication date
Apr 18, 2002
FUJITSU LIMITED
Tomoto Tanaka
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OPTICAL AMPLIFICATION APPARATUS UTILIZING RAMAN AMPLIFICATION AND C...
Publication number
20020041429
Publication date
Apr 11, 2002
Yasushi Sugaya
H01 - BASIC ELECTRIC ELEMENTS