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Ryozo Nunokawa
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Yokohama, JP
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last 30 patents
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Patent Grant
Communications system using portable recording medium
Patent number
6,470,082
Issue date
Oct 22, 2002
Nippon Telegraph and Telephone Corporation
Ryozo Nunokawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Communications system using portable recording medium
Patent number
6,229,882
Issue date
May 8, 2001
Nippon Telegraph and Telephone Corporation
Ryozo Nunokawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Communications system using portable recording medium
Patent number
5,982,877
Issue date
Nov 9, 1999
Nippon Telegraph & Telephone Corporation
Ryozo Nunokawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE