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Yokohama, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Optical transmission system, optical transmitting apparatus, and op...
Patent number
9,184,864
Issue date
Nov 10, 2015
Fujitsu Limited
Takeo Osaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Pre-emphasis control method and optical transmission system
Patent number
9,037,002
Issue date
May 19, 2015
Fujitsu Limited
Jyunji Tanaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Repeater and Raman amplification repeating system
Patent number
7,146,100
Issue date
Dec 5, 2006
Fujitsu Limited
Takeo Osaka
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
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
Optical multiplexing/demultiplexing device
Patent number
6,301,032
Issue date
Oct 9, 2001
Fujitsu Limited
Takeo Osaka
G02 - OPTICS
Information
Patent Grant
Optical amplifying repeater
Patent number
5,768,011
Issue date
Jun 16, 1998
Fujitsu Limited
Kazuya Amaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM, OPTICAL TRANSMITTING APPARATUS, AND OP...
Publication number
20130004162
Publication date
Jan 3, 2013
Fujitsu Limited
Takeo Osaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
PRE-EMPHASIS CONTROL METHOD AND OPTICAL TRANSMISSION SYSTEM
Publication number
20120121257
Publication date
May 17, 2012
Fujitsu Limited
Jyunji TANAKA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Repeater and Raman amplification repeating system
Publication number
20050179989
Publication date
Aug 18, 2005
FUJITSU LIMITED
Takeo Osaka
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
WAVELENGTH DIVISION MULTIPLEXING COMMUNICATIONS NETWORK SUPERVISORY...
Publication number
20020063921
Publication date
May 30, 2002
FUJITSU LIMITED
TAKAFUMI TERAHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE