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Shin-Ichirou Harasawa
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Kawasaki, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Optical transmission system in which gains in gain bands are remote...
Patent number
7,031,618
Issue date
Apr 18, 2006
Fujitsu Limited
Shin-ichirou Harasawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system
Patent number
6,980,745
Issue date
Dec 27, 2005
Fujitsu Limited
Hiroyuki Deguchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method and system for optical fiber transmission using raman amplif...
Patent number
6,907,157
Issue date
Jun 14, 2005
Fujitsu Limited
Shin-ichirou Harasawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
System and method for equalizing transmission characteristics in wa...
Patent number
6,847,788
Issue date
Jan 25, 2005
Fujitsu Limited
Isao Nakajima
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Wavelength division multiplexing communications network supervisory...
Patent number
6,816,683
Issue date
Nov 9, 2004
Fujitsu Limited
Takafumi Terahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system
Patent number
6,807,370
Issue date
Oct 19, 2004
Fujitsu Limited
Shin-ichirou Harasawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Wavelength division multiplexing communications network supervisory...
Patent number
6,452,701
Issue date
Sep 17, 2002
Fujitsu Limited
Takafumi Terahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method, device, and system for evaluating characteristics of optica...
Patent number
6,452,721
Issue date
Sep 17, 2002
Fujitsu Limited
Hiroyuki Deguchi
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Wavelength division multiplexing system and its termination
Patent number
6,404,523
Issue date
Jun 11, 2002
Fujitsu Limited
Hajime Morikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical multiplexing/demultiplexing device
Patent number
6,301,032
Issue date
Oct 9, 2001
Fujitsu Limited
Takeo Osaka
G02 - OPTICS
Information
Patent Grant
Optical transmission system and transmitting terminal station
Patent number
6,185,022
Issue date
Feb 6, 2001
Fujitsu Limited
Shin-ichirou Harasawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Light transmission system
Patent number
6,075,633
Issue date
Jun 13, 2000
Fujitsu Limited
Hiroyuki Deguchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
Method and system for optical fiber transmission using Raman amplif...
Publication number
20030202237
Publication date
Oct 30, 2003
FUJITSU LIMITED
Shin-Ichirou Harasawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical transmission system
Publication number
20030035184
Publication date
Feb 20, 2003
FUJITSU LIMITED
Hiroyuki Deguchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical transmission system in which gains in gain bands are remote...
Publication number
20030020995
Publication date
Jan 30, 2003
FUJITSU LIMITED
Shin-Ichirou Harasawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Wavelength division multiplexing communications network supervisory...
Publication number
20020196489
Publication date
Dec 26, 2002
FUJITSU LIMITED
TAKAFUMI TERAHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical transmission system
Publication number
20020131099
Publication date
Sep 19, 2002
FUJITSU LIMITED
Shin-Ichirou Harasawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
WAVELENGTH DIVISION MULTIPLEXING COMMUNICATIONS NETWORK SUPERVISORY...
Publication number
20020063921
Publication date
May 30, 2002
FUJITSU LIMITED
TAKAFUMI TERAHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Method, device, and system for evaluating characteristics of optica...
Publication number
20010050807
Publication date
Dec 13, 2001
Hiroyuki Deguchi
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
System and method for equalizing transmission characteristics in wa...
Publication number
20010019436
Publication date
Sep 6, 2001
Isao Nakajima
H04 - ELECTRIC COMMUNICATION TECHNIQUE