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Mitsuhiro Oikawa
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Fujisawa, JP
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Patents Grants
last 30 patents
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Patent Grant
Attribute certificate validation method and device
Patent number
7,840,804
Issue date
Nov 23, 2010
Hitachi, Ltd.
Mitsuhiro Oikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
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Patent Application
Attribute certificate validation method and device
Publication number
20060277417
Publication date
Dec 7, 2006
Mitsuhiro Oikawa
G06 - COMPUTING CALCULATING COUNTING
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Patent Application
Electronic certificate validity check system and its method
Publication number
20050193192
Publication date
Sep 1, 2005
Hisao Sakazaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE