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Kawasaki-shi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Multi-wavelength light amplifier
Patent number
8,699,126
Issue date
Apr 15, 2014
Fujitsu Limited
Yasushi Sugaya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Multi-wavelength light amplifier
Patent number
8,320,040
Issue date
Nov 27, 2012
Fujitsu Limited
Yasushi Sugaya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Multi-wavelength light amplifier
Patent number
8,004,752
Issue date
Aug 23, 2011
Fujitsu Limited
Yasushi Sugaya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Multi-wavelength light amplifier
Patent number
7,474,459
Issue date
Jan 6, 2009
Fujitsu Limited
Yasushi Sugaya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Multi-wavelength light amplifier
Patent number
7,224,517
Issue date
May 29, 2007
Fujitsu Limited
Yasushi Sugaya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Light branching/inserting apparatus and light branching apparatus u...
Patent number
7,142,785
Issue date
Nov 28, 2006
Fujitsu Limited
Kazue Otsuka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Wavelength division multiplexing optical communication system
Patent number
7,088,922
Issue date
Aug 8, 2006
Fujitsu Limited
Hiroaki Tomofuji
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier and method for amplifying wavelength multiplexed...
Patent number
6,891,662
Issue date
May 10, 2005
Fujitsu Limited
Yasushi Sugaya
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Optical amplifier, excitation light source control method for use i...
Patent number
6,873,457
Issue date
Mar 29, 2005
Fujitsu Limited
Susumu Kinoshita
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Gain equalizer which includes a plurality of optical filters for eq...
Patent number
6,807,376
Issue date
Oct 19, 2004
Fujitsu Limited
Naomasa Shimojoh
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical sending apparatus and channel extension method
Patent number
6,738,181
Issue date
May 18, 2004
Fujitsu Limited
Hiroshi Nakamoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmitter and optical transmission system
Patent number
6,661,974
Issue date
Dec 9, 2003
Fujitsu Limited
Yuichi Akiyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
REMOTE CONTROL DEVICE OF ACOUSTO-OPTIC TUNABLE FILTER AND OPTICAL T...
Patent number
6,647,211
Issue date
Nov 11, 2003
Fujitsu Limited
Takafumi Terahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier, excitation light source control method for use i...
Patent number
6,631,026
Issue date
Oct 7, 2003
Fujitsu Limited
Susumu Kinoshita
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission apparatus, optical transmission system, and op...
Patent number
6,583,900
Issue date
Jun 24, 2003
Fujitsu Limited
Hiroshi Onaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical cross connect unit, optical add-drop multiplexer, light sou...
Patent number
6,545,784
Issue date
Apr 8, 2003
Fujitsu Limited
Kazue Okazaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier excitation light source control method for use in...
Patent number
6,542,291
Issue date
Apr 1, 2003
Fujitsu Limited
Susumu Kinoshita
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Light branching/inserting apparatus and light branching apparatus u...
Patent number
6,538,782
Issue date
Mar 25, 2003
Fujitsu Limited
Kazue Otsuka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Remotely pumping type multi-wavelength light transmission system
Patent number
6,507,431
Issue date
Jan 14, 2003
Fujitsu Limited
Yasushi Sugaya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier
Patent number
6,496,300
Issue date
Dec 17, 2002
Fujitsu Limited
Susumu Kinoshita
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Multi-wavelength light amplifier
Patent number
6,480,329
Issue date
Nov 12, 2002
Fujitsu Limited
Yasushi Sugaya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical wavelength selective control apparatus
Patent number
6,411,411
Issue date
Jun 25, 2002
Fujitsu Limited
Kazue Okazaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Multi-wavelength light amplifier
Patent number
6,400,499
Issue date
Jun 4, 2002
Fujitsu Limited
Yasushi Sugaya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier for use in optical communications equipment
Patent number
6,373,623
Issue date
Apr 16, 2002
Fujitsu Limited
Chihiro Ohshima
G02 - OPTICS
Information
Patent Grant
Multi-wavelength light amplifier
Patent number
6,369,938
Issue date
Apr 9, 2002
Fujitsu Limited
Yasushi Sugaya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
REMOTE CONTROL DEVICE OF ACOUSTO-OPTIC TUNABLE FILTER AND OPTICAL T...
Patent number
6,366,379
Issue date
Apr 2, 2002
Fujitsu Limited
Takafumi Terahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmitting device using wavelength division multiplexing...
Patent number
6,366,376
Issue date
Apr 2, 2002
Fujitsu Limited
Hideyuki Miyata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission apparatus, optical transmission system, and op...
Patent number
6,351,323
Issue date
Feb 26, 2002
Fujitsu Limited
Hiroshi Onaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Gain equalizer which includes a plurality of optical filters for eq...
Patent number
6,344,914
Issue date
Feb 5, 2002
Fujitsu Limited
Naomasa Shimojoh
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier for use in optical communications equipment
Patent number
6,335,823
Issue date
Jan 1, 2002
Fujitsu Limited
Chihiro Ohshima
H01 - BASIC ELECTRIC ELEMENTS
Patents Applications
last 30 patents
Information
Patent Application
MULTI-WAVELENGTH LIGHT AMPLIFIER
Publication number
20130045007
Publication date
Feb 21, 2013
FUJITSU LIMITED
Yasushi SUGAYA
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
MULTI-WAVELENGTH LIGHT AMPLIFIER
Publication number
20110262140
Publication date
Oct 27, 2011
FUJITSU LIMITED
Yasushi Sugaya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
MULTI-WAVELENGTH LIGHT AMPLIFIER
Publication number
20090225403
Publication date
Sep 10, 2009
Yasushi Sugaya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
MULTI-WAVELENGTH LIGHT AMPLIFIER
Publication number
20070165299
Publication date
Jul 19, 2007
FUJITSU LIMITED
Yasushi Sugaya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Wavelength division multiplexing optical communication system
Publication number
20030215233
Publication date
Nov 20, 2003
FUJITSU LIMITED
Hiroaki Tomofuji
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical amplifier, excitation light source control method for use i...
Publication number
20030147123
Publication date
Aug 7, 2003
FUJITSU LIMITED
Susumu Kinoshita
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Light branching/inserting apparatus and light branching apparatus u...
Publication number
20030138254
Publication date
Jul 24, 2003
FUJITSU LIMITED
Kazue Otsuka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Multi-wavelength light amplifier
Publication number
20030002140
Publication date
Jan 2, 2003
FUJITSU LIMITED
Yasushi Sugaya
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Optical amplifier, excitation light source control method for use i...
Publication number
20030002139
Publication date
Jan 2, 2003
FUJITSU LIMITED
Susumu Kinoshita
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Optical transmission apparatus, optical transmission system, and op...
Publication number
20020101633
Publication date
Aug 1, 2002
FUJITSU LIMITED
Hiroshi Onaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Remote control device of acousto-optic tunable filter and optical t...
Publication number
20020097467
Publication date
Jul 25, 2002
FUJITSU LIMITED
Takafumi Terahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Multi-wavelength light amplifier
Publication number
20020093726
Publication date
Jul 18, 2002
FUJITSU LIMITED
Yasushi Sugaya
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Optical amplifier and method for amplifying wavelength multiplexed...
Publication number
20020093728
Publication date
Jul 18, 2002
Yasushi Sugaya
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Gain equalizer which includes a plurality of optical filters for eq...
Publication number
20020033995
Publication date
Mar 21, 2002
FUJITSU LIMITED
Naomasa Shimojoh
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Optical cross connect unit, optical add-drop multiplexer, light sou...
Publication number
20020030869
Publication date
Mar 14, 2002
Kazue Okazaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL AMPLIFIER
Publication number
20020027703
Publication date
Mar 7, 2002
FUJITSU LIMITED
SUSUMU KINOSHITA
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Optical amplifier for use in optical communications equipment
Publication number
20010050805
Publication date
Dec 13, 2001
Chihiro Ohshima
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Multi-wavelength light amplifier
Publication number
20010046084
Publication date
Nov 29, 2001
Yasushi Sugaya
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Multi-wavelength light amplifier
Publication number
20010026395
Publication date
Oct 4, 2001
Yasushi Sugaya
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Optical amplifier for use in optical communications equipment
Publication number
20010008459
Publication date
Jul 19, 2001
Chihiro Ohshima
H01 - BASIC ELECTRIC ELEMENTS