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Toshiomi Kodama
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Kawasaki, JP
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last 30 patents
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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
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last 30 patents
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Patent Application
Certificate management system and method
Publication number
20050120205
Publication date
Jun 2, 2005
Hitachi, Ltd.
Katsuyuki Umezawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE