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Akihisa Kawaguchi
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Kawasaki, JP
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Patents Grants
last 30 patents
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Patent Grant
Transmission system and method of correcting tilt of the transmissi...
Patent number
8,693,874
Issue date
Apr 8, 2014
Fujitsu Limited
Tomoyuki Suzuki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Transmission apparatus, transmission controlling method, and optica...
Patent number
8,326,147
Issue date
Dec 4, 2012
Fujitsu Telecom Networks Limited
Koji Tanonaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method of controlling optical wavelength division multiplexing tran...
Patent number
7,206,512
Issue date
Apr 17, 2007
Fujitsu Limited
Akihisa Kawaguchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Level adjustment method and wavelength division multiplexing device...
Patent number
6,839,518
Issue date
Jan 4, 2005
Fujitsu Limited
Kazuhiro Minamimoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
WAVELENGTH DIVISION MULTIPLEXING TRANSMISSION SYSTEM
Publication number
20170047990
Publication date
Feb 16, 2017
Fujitsu Limited
Akihisa KAWAGUCHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
TRANSMISSION APPARATUS, TRANSMISSION CONTROLLING METHOD, AND OPTICA...
Publication number
20110008049
Publication date
Jan 13, 2011
FUJITSU TELECOM NETWORKS LIMITED
Koji Tanonaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
TRANSMISSION SYSTEM AND METHOD OF CORRECTING TILT OF THE TRANSMISSI...
Publication number
20100322633
Publication date
Dec 23, 2010
FUJITSU TELECOM NETWORKS LIMITED
Tomoyuki Suzuki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Method of controlling optical wavelength division multiplexing tran...
Publication number
20040202469
Publication date
Oct 14, 2004
FUJITSU LIMITED
Akihisa Kawaguchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Packet communications method and apparatus
Publication number
20030118042
Publication date
Jun 26, 2003
Mitsuhiro Nishida
H04 - ELECTRIC COMMUNICATION TECHNIQUE