Tsunetoshi Mizusawa

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
VoIP gateway device and digital one-link tandem exchange method
- Patent number 7,039,059
- Issue date May 2, 2006
- NEC Corporation
- Tsunetoshi Mizusawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
VoIP gateway device and digital one-link tandem exchange method
- Publication number 20020037002
- Publication date Mar 28, 2002
- NEC Corporation
- Tsunetoshi Mizusawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE