Yukichi Tatsumi

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Fukuoka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Private branch exchange (PBX) system, private branch exchange, and...
- Patent number 6,788,778
- Issue date Sep 7, 2004
- Matsushita Electric Industrial Co., Ltd.
- Yukichi Tatsumi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Private branch exchange (PBX) system, private branch exchange, and...
- Publication number 20020064275
- Publication date May 30, 2002
- Yukichi Tatsumi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE