Seiichiro Sakai

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Identity confidentiality method in radio communication system
- Patent number 5,889,861
- Issue date Mar 30, 1999
- Kokusai Denshin Denwa Co., Ltd.
- Masayoshi Ohashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Authentication method for mobile communications
- Patent number 5,596,641
- Issue date Jan 21, 1997
- Kokusai Denshin Denwa Co. Ltd.
- Masayoshi Ohashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication system using a bidirectional tree structure network
- Patent number 5,559,803
- Issue date Sep 24, 1996
- Kokusai Denshin Denwa Co., Ltd.
- Seiichiro Sakai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE