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Kawasaki, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Optical transmission system with automatic signal level adjustment...
Patent number
7,509,055
Issue date
Mar 24, 2009
Fujitsu Limited
Hiroaki Tomofuji
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system with automatic signal level adjustment...
Patent number
7,343,102
Issue date
Mar 11, 2008
Fujitsu Limited
Hiroaki Tomofuji
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical multiplex communication system, optical transmission appara...
Patent number
7,092,638
Issue date
Aug 15, 2006
Fujitsu Limited
Yoshihisa Funami
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Wavelength-division multiplexing optical transmission system and re...
Patent number
7,006,278
Issue date
Feb 28, 2006
Fujitsu Limited
Takeshi Sakamoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical level control method
Patent number
6,937,820
Issue date
Aug 30, 2005
Fujitsu Limited
Hiroyuki Iwaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Controlling apparatus and controlling method for wavelength divisio...
Patent number
6,870,666
Issue date
Mar 22, 2005
Fujitsu Limited
Tetsuo Wada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical communication system and optical signal control method ther...
Patent number
6,583,909
Issue date
Jun 24, 2003
Fujitsu Limited
Tetsuo Wada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Controlling apparatus and controlling method for wavelength divisio...
Patent number
6,560,008
Issue date
May 6, 2003
Fujitsu Limited
Tetsuo Wada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system
Patent number
6,064,513
Issue date
May 16, 2000
Fujitsu Limited
Tetsuo Wada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Slice amplifier using FET's
Patent number
4,816,699
Issue date
Mar 28, 1989
Fujitsu Limited
Masakazu Mori
H03 - BASIC ELECTRONIC CIRCUITRY
Patents Applications
last 30 patents
Information
Patent Application
TRANSMISSION APPARATUS, ELECTRONIC DEVICE, AND ACTIVATION CONTROL M...
Publication number
20180314311
Publication date
Nov 1, 2018
Fujitsu Limited
Daijiro Tanaka
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Optical transmission system with automatic signal level adjustment...
Publication number
20080159753
Publication date
Jul 3, 2008
FUJITSU LIMITED
Hiroaki Tomofuji
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical transmission system with automatic signal level adjustment...
Publication number
20050158057
Publication date
Jul 21, 2005
FUJITSU LIMITED
Hiroaki Tomofuji
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Wavelength-division multiplexing optical transmission system and re...
Publication number
20040086279
Publication date
May 6, 2004
FUJITSU LIMITED
Takeshi Sakamoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical multiplex communication system, optical transmission appara...
Publication number
20030147647
Publication date
Aug 7, 2003
FUJITSU LIMITED
Yoshihisa Funami
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Controlling apparatus and controlling method for wavelength divisio...
Publication number
20030123134
Publication date
Jul 3, 2003
FUJITSU LIMITED
Tetsuo Wada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical level control method
Publication number
20020024690
Publication date
Feb 28, 2002
Hiroyuki Iwaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE