Ryoji Kawasaki

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Kanagawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Interconnection control method in cordless telephone system
- Patent number 4,991,198
- Issue date Feb 5, 1991
- Nippon Telegraph & Telephone Corporation
- Kazuyuki Tate
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cordless telephone system
- Patent number 4,876,708
- Issue date Oct 24, 1989
- NEC Corporation
- Noboru Saegusa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Radio telephone system
- Patent number 4,875,231
- Issue date Oct 17, 1989
- NEC Corporation
- Toshihiro Hara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method of transmitting terminating call signals within a restricted...
- Patent number 4,736,461
- Issue date Apr 5, 1988
- Nippon Telegraph and Telephone Public Corporation
- Ryoji Kawasaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method of transmitting terminating call signals within a restricted...
- Patent number 4,679,244
- Issue date Jul 7, 1987
- Nippon Telegraph and Telephone Public Corporation
- Ryoji Kawasaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE