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Seiichi Susaki
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Yokohama, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Digital signing method
Patent number
7,770,009
Issue date
Aug 3, 2010
Hitachi, Ltd.
Kunihiko Miyazaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method and system for recovering the validity of cryptographically...
Patent number
7,694,126
Issue date
Apr 6, 2010
Hitachi, Ltd.
Kunihiko Miyazaki
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Electronic document authenticity assurance method and electronic do...
Patent number
7,526,645
Issue date
Apr 28, 2009
Hitachi, Ltd.
Kunihiko Miyazaki
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Certificate management system and method
Patent number
7,386,722
Issue date
Jun 10, 2008
Hitachi, Ltd.
Katsuyuki Umezawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Information processor-based service providing system and method
Patent number
7,357,313
Issue date
Apr 15, 2008
Hitachi, Ltd.
Hiroki Uchiyama
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Digital signing method
Patent number
7,305,558
Issue date
Dec 4, 2007
Hitachi, Ltd.
Kunihiko Miyazaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Time stamp generating system
Patent number
7,200,682
Issue date
Apr 3, 2007
Hitachi, Ltd.
Kunihiko Miyazaki
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Method and system for recovering the validity of cryptographically...
Patent number
7,134,021
Issue date
Nov 7, 2006
Hitachi, Ltd.
Kunihiko Miyazaki
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Digital signature generating method and digital signature verifying...
Patent number
6,816,969
Issue date
Nov 9, 2004
Hitachi, Ltd.
Kunihiko Miyazaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Digital data authentication method
Patent number
6,499,105
Issue date
Dec 24, 2002
Hitachi, Ltd.
Hiroshi Yoshiura
G06 - COMPUTING CALCULATING COUNTING
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
Electronic certification authentication method and system
Patent number
6,253,322
Issue date
Jun 26, 2001
Hitachi, Ltd.
Seiichi Susaki
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Client-server system for controlling access rights to certain servi...
Patent number
6,189,032
Issue date
Feb 13, 2001
Hitachi, Ltd.
Seiichi Susaki
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Digital data authentication method
Patent number
6,131,162
Issue date
Oct 10, 2000
Hitachi Ltd.
Hiroshi Yoshiura
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Electronic document processing system and method of forming digital...
Patent number
5,465,299
Issue date
Nov 7, 1995
Hitachi, Ltd.
Hiroshi Matsumoto
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Group cipher communication method and group cipher communication sy...
Patent number
5,309,516
Issue date
May 3, 1994
Hitachi, Ltd.
Kazuo Takaragi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
ELECTRONIC DOCUMENT AUTHENTICITY ASSURANCE METHOD AND ELECTRONIC DO...
Publication number
20090193259
Publication date
Jul 30, 2009
Hitachi, Ltd
Kunihiko Miyazaki
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Digital signing method
Publication number
20080098232
Publication date
Apr 24, 2008
Hitachi, Ltd
Kunihiko Miyazaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Attribute Certificate Verification Method and System
Publication number
20080016335
Publication date
Jan 17, 2008
Aya Takahashi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Information processor-based service providing system and method
Publication number
20070057044
Publication date
Mar 15, 2007
Hiroki Uchiyama
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Method and system for recovering the validity of cryptographically...
Publication number
20060059357
Publication date
Mar 16, 2006
Hitachi, Ltd
Kunihiko Miyazaki
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Electronic certificate validity check system and its method
Publication number
20050193192
Publication date
Sep 1, 2005
Hisao Sakazaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Digital data authentication method
Publication number
20050182939
Publication date
Aug 18, 2005
Hiroshi Yoshiura
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Certificate management system and method
Publication number
20050120205
Publication date
Jun 2, 2005
Hitachi, Ltd.
Katsuyuki Umezawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Electronic document authenticity assurance method and electronic do...
Publication number
20050015600
Publication date
Jan 20, 2005
Kunihiko Miyazaki
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Time stamp generating system
Publication number
20030212828
Publication date
Nov 13, 2003
Kunihiko Miyazaki
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Rating information publishing system
Publication number
20020120870
Publication date
Aug 29, 2002
Seiichi Susaki
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Digital signature generating method and digital signature verifying...
Publication number
20020108044
Publication date
Aug 8, 2002
Kunihiko Miyazaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Digital data authentication method
Publication number
20020095579
Publication date
Jul 18, 2002
Hiroshi Yoshiura
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Access control method
Publication number
20020049912
Publication date
Apr 25, 2002
Shinsuke Honjo
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Method and system for recovering the validity of cryptographically...
Publication number
20020023221
Publication date
Feb 21, 2002
Kunihiko Miyazaki
G06 - COMPUTING CALCULATING COUNTING