Koji Tsukada

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of requesting security and release of communication band
- Patent number 7,145,901
- Issue date Dec 5, 2006
- Hitachi, Ltd.
- Koji Tsukada
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multi-user talking system and multi-user talking method
- Patent number 7,146,629
- Issue date Dec 5, 2006
- Hitachi, Ltd.
- Koji Tsukada
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Network system having plural networks for performing quality guaran...
- Patent number 6,708,209
- Issue date Mar 16, 2004
- Hitachi, Ltd.
- Tomoichi Ebata
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Data gateway and method for relaying data
- Patent number 6,618,368
- Issue date Sep 9, 2003
- Hitachi, Ltd.
- Keiko Tanigawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication system with communication route retrieval and selecti...
- Patent number 6,483,835
- Issue date Nov 19, 2002
- Hitachi, Ltd.
- Keiko Tanigawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Network system having plural networks for performing quality guaran...
- Publication number 20040064541
- Publication date Apr 1, 2004
- Tomoichi Ebata
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Method of requesting security and release of communication band
- Publication number 20020176406
- Publication date Nov 28, 2002
- Koji Tsukada
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Multi-user talking system and multi-user talking method
- Publication number 20020057335
- Publication date May 16, 2002
- Koji Tsukada
- H04 - ELECTRIC COMMUNICATION TECHNIQUE