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Masayuki Ishizaki
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Kawasaki, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Encryption processing system
Patent number
6,460,137
Issue date
Oct 1, 2002
Fujitsu Limited
Ryota Akiyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Information selling method and information selling system
Patent number
6,021,390
Issue date
Feb 1, 2000
Fujitsu Limited
Kazuo Satoh
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Information distributing system with sub-stations transmitting broa...
Patent number
5,884,140
Issue date
Mar 16, 1999
Fujitsu Limited
Masayuki Ishizaki
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
System for and method of authenticating a client
Patent number
5,784,464
Issue date
Jul 21, 1998
Fujitsu Limited
Ryota Akiyama
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Automatic vending machine for vending information transmitted from...
Patent number
5,699,328
Issue date
Dec 16, 1997
Fujitsu Limited
Masayuki Ishizaki
G07 - CHECKING-DEVICES
Information
Patent Grant
IC memory card and method of protecting data therein
Patent number
5,428,685
Issue date
Jun 27, 1995
Fujitsu Limited
Yoshimasa Kadooka
G06 - COMPUTING CALCULATING COUNTING
Patents Applications
last 30 patents
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Patent Application
Two-way communication system
Publication number
20020062483
Publication date
May 23, 2002
Masayuki Ishizaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE