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Masami Doukai
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Kawasaki, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Path protection method and layer-2 switch
Patent number
8,199,639
Issue date
Jun 12, 2012
Fujitsu Limited
Masami Doukai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Fault detection device
Patent number
7,957,267
Issue date
Jun 7, 2011
Fujitsu Limited
Yasushi Sasagawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Apparatus and method for processing control packet in spanning tree...
Patent number
7,860,031
Issue date
Dec 28, 2010
Fujitsu Limited
Yasushi Sasagawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Carrier network of virtual network system and communication node of...
Patent number
7,633,889
Issue date
Dec 15, 2009
Fujitsu Limited
Atsuko Higashitaniguchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Restoration and protection method and an apparatus thereof
Patent number
7,590,048
Issue date
Sep 15, 2009
Fujitsu Limited
Masami Doukai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
WDM device, client device, network, system and method for allocatin...
Patent number
7,120,357
Issue date
Oct 10, 2006
Fujitsu Limited
Masami Doukai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
Path protection method and layer-2 switch
Publication number
20070086333
Publication date
Apr 19, 2007
FUJITSU LIMITED
Masami Doukai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Bridge apparatus and control packet processing apparatus in a spann...
Publication number
20060203735
Publication date
Sep 14, 2006
FUJITSU LIMITED
Kou Takatori
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Communication apparatus
Publication number
20060198315
Publication date
Sep 7, 2006
FUJITSU LIMITED
Yasushi Sasagawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Fault detection device
Publication number
20060182036
Publication date
Aug 17, 2006
FUJITSU LIMITED
Yasushi Sasagawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Carrier network of virtual network system and communication node of...
Publication number
20050163102
Publication date
Jul 28, 2005
Atsuko Higashitaniguchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
WDM device, client device, network, system and method for allocatin...
Publication number
20040208502
Publication date
Oct 21, 2004
FUJITSU LIMITED
Masami Doukai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Apparatus and method for processing control packet in spanning tree...
Publication number
20040179524
Publication date
Sep 16, 2004
Yasushi Sasagawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Restoration and protection method and an apparatus thereof
Publication number
20040114595
Publication date
Jun 17, 2004
Masami Doukai
H04 - ELECTRIC COMMUNICATION TECHNIQUE