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Tomohisa Ishikawa
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Kawasaki, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Control device of modulating signal and method
Patent number
11,689,293
Issue date
Jun 27, 2023
Fujitsu Optical Components Limited
Tomohisa Ishikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Wavelength control method and optical transmission device
Patent number
8,364,045
Issue date
Jan 29, 2013
Fujitsu Optical Components Limited
Tomohisa Ishikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Light source error detection apparatus and method
Patent number
7,642,495
Issue date
Jan 5, 2010
Fujitsu Limited
Tomohisa Ishikawa
G01 - MEASURING TESTING
Information
Patent Grant
Method and system for monitoring of optical transmission lines
Patent number
6,269,204
Issue date
Jul 31, 2001
Fujitsu Limited
Tomohisa Ishikawa
G02 - OPTICS
Information
Patent Grant
Optical network system
Patent number
5,936,753
Issue date
Aug 10, 1999
Fujitsu Limited
Tomohisa Ishikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical beam splitting device and method of controlling optical bea...
Patent number
5,859,936
Issue date
Jan 12, 1999
Fujitsu Limited
Tomohisa Ishikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical telecommunication module
Patent number
5,854,702
Issue date
Dec 29, 1998
Fujitsu Limited
Tomohisa Ishikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical communications module
Patent number
5,677,779
Issue date
Oct 14, 1997
Fujitsu Limited
Gan Oda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
CONTROL DEVICE OF MODULATING SIGNAL AND METHOD
Publication number
20220303018
Publication date
Sep 22, 2022
FUJITSU OPTICAL COMPONENTS LIMITED
Tomohisa ISHIKAWA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL MODULATION CONTROL APPARATUS, TRANSMITTER, AND OPTICAL OUTP...
Publication number
20160218799
Publication date
Jul 28, 2016
FUJITSU OPTICAL COMPONENTS LIMITED
Tomohisa ISHIKAWA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Wavelength control method and optical transmission device
Publication number
20110052207
Publication date
Mar 3, 2011
FUJITSU OPTICAL COMPONENTS LIMITED
Tomohisa Ishikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
LIGHT SOURCE ERROR DETECTION APPARATUS AND METHOD
Publication number
20080265132
Publication date
Oct 30, 2008
FUJITSU LIMITED
Tomohisa Ishikawa
G01 - MEASURING TESTING