Fumio Urayama

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Fukushima-ken, JP

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Patents Grantslast 30 patents

Information Patent Grant
Call connection control unit and call connection control method
- Patent number 7,796,741
- Issue date Sep 14, 2010
- Hitachi Communication Technologies, Ltd.
- Fumio Urayama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
IP telephone system
- Patent number 7,577,135
- Issue date Aug 18, 2009
- Hitachi Communication Technologies, Ltd.
- Hiroyuki Sato
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
IP TELEPHONE
- Publication number 20080123546
- Publication date May 29, 2008
- Hitachi Communication Technologies, Ltd.
- Shinsuke ISONO
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Call connection control unit and call connection control method
- Publication number 20070121827
- Publication date May 31, 2007
- Fumio Urayama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
IP telephone system
- Publication number 20060217997
- Publication date Sep 28, 2006
- Hitachi Communication Technologies, Ltd.
- Hiroyuki Sato
- H04 - ELECTRIC COMMUNICATION TECHNIQUE