Membership
Tour
Register
Log in
Eisaku Touma
Follow
Person
Kawasaki, JP
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Redundancy method and switch apparatus
Patent number
7,952,994
Issue date
May 31, 2011
Fujitsu Limited
Eisaku Touma
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical signal judging system and optical signal judging method
Patent number
7,283,742
Issue date
Oct 16, 2007
Fujitsu Limited
Eisaku Touma
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
Optical wavelength multiplexing transmission apparatus and optical...
Patent number
7,099,595
Issue date
Aug 29, 2006
Fujitsu Limited
Eisaku Touma
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical wavelength multiplexing transmission apparatus and optical...
Patent number
6,819,875
Issue date
Nov 16, 2004
Fujitsu Limited
Eisaku Touma
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical subscriber network system
Patent number
6,288,809
Issue date
Sep 11, 2001
Fujitsu Limited
Eisaku Touma
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical subscriber network system and fault supervising method for...
Patent number
6,288,806
Issue date
Sep 11, 2001
Fujitsu Limited
Eisaku Touma
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method and apparatus for failure recovery in passive optical network
Patent number
6,108,112
Issue date
Aug 22, 2000
Fujitsu Limited
Eisaku Touma
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
REDUNDANCY METHOD AND SWITCH APPARATUS
Publication number
20090161563
Publication date
Jun 25, 2009
FUJITSU LIMITED
Eisaku Touma
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical protection apparatus
Publication number
20050207753
Publication date
Sep 22, 2005
FUJITSU LIMITED
Eisaku Touma
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical signal judging system and optical signal judging method
Publication number
20050123296
Publication date
Jun 9, 2005
FUJITSU LIMITED
Eisaku Touma
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical wavelength multiplexing transmission apparatus and optical...
Publication number
20040264956
Publication date
Dec 30, 2004
FUJITSU LIMITED
Eisaku Touma
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
Optical wavelength multiplexing transmission apparatus and optical...
Publication number
20030035171
Publication date
Feb 20, 2003
FUJITSU LIMITED
Eisaku Touma
H04 - ELECTRIC COMMUNICATION TECHNIQUE