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Patents Grants
last 30 patents
Information
Patent Grant
Certificate validity authentication method and apparatus
Patent number
7,409,551
Issue date
Aug 5, 2008
Hitachi, Ltd.
Takahiro Fujishiro
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Public key certificate generation method, validation method and app...
Patent number
7,409,553
Issue date
Aug 5, 2008
Hitachi, Ltd.
Yoko Kumagai
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Certificate validity authentication method and apparatus
Patent number
7,080,251
Issue date
Jul 18, 2006
Hitachi, Ltd.
Takahiro Fujishiro
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Virtual network displaying system
Patent number
6,789,090
Issue date
Sep 7, 2004
Hitachi, Ltd.
Shigeru Miyake
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Network managing method and system
Patent number
6,735,626
Issue date
May 11, 2004
Hitachi, Ltd.
Satoru Tezuka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Network managing method, medium and system
Patent number
6,732,170
Issue date
May 4, 2004
Hitachi, Ltd.
Shigeru Miyake
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Distributed object system and service supply method therein
Patent number
6,327,658
Issue date
Dec 4, 2001
Hitachi, Ltd.
Seiichi Susaki
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Network managing method and system
Patent number
6,047,320
Issue date
Apr 4, 2000
Hitachi, Ltd.
Satoru Tezuka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Integrated network installation system
Patent number
6,018,769
Issue date
Jan 25, 2000
Hitachi, Ltd.
Satoru Tezuka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Network development support system
Patent number
5,999,181
Issue date
Dec 7, 1999
Hitachi, Ltd.
Satoru Tezuka
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Network operating information system having design device and autom...
Patent number
5,901,288
Issue date
May 4, 1999
Hitachi, Ltd.
Kenichi Kihara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Network integrated construction system, method of installing networ...
Patent number
5,845,078
Issue date
Dec 1, 1998
Hitachi, Ltd.
Satoru Tezuka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Management system for updating network managed by physical manager...
Patent number
5,764,911
Issue date
Jun 9, 1998
Hitachi, Ltd.
Satoru Tezuka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Support system for constructing an integrated network
Patent number
5,687,315
Issue date
Nov 11, 1997
Hitachi, Ltd.
Satoru Tezuka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Network development support system
Patent number
5,619,640
Issue date
Apr 8, 1997
Hitachi, Ltd.
Satoru Tezuka
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Distributed information processing system providing a resume functi...
Patent number
5,539,885
Issue date
Jul 23, 1996
Hitachi, Ltd.
Katsuhiro Ono
G06 - COMPUTING CALCULATING COUNTING
Patents Applications
last 30 patents
Information
Patent Application
Certificate validity authentication method and apparatus
Publication number
20060242413
Publication date
Oct 26, 2006
Takahiro Fujishiro
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Network management system having a network including virtual networks
Publication number
20050025071
Publication date
Feb 3, 2005
Shigeru Miyake
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Public key certificate generation method, validation method and app...
Publication number
20030097566
Publication date
May 22, 2003
Yoko Kumagai
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Certificate validity authentication method and apparatus
Publication number
20020046340
Publication date
Apr 18, 2002
Takahiro Fujishiro
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Network managing method, medium and system
Publication number
20010042118
Publication date
Nov 15, 2001
Shigeru Miyake
H04 - ELECTRIC COMMUNICATION TECHNIQUE