Kazuchika Ogiwara

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Hitachinaka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Communication system and terminal units connected thereto
- Patent number 7,584,431
- Issue date Sep 1, 2009
- Hitachi, Ltd.
- Hiroi Kazushige
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Video telephone system and terminal device therefor
- Patent number 6,850,267
- Issue date Feb 1, 2005
- Hitachi, Ltd.
- Kazushige Hiroi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Communication system and terminal units connected thereto
- Publication number 20040139052
- Publication date Jul 15, 2004
- Hiroi Kazushige
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Video telephone system and terminal device therefor
- Publication number 20030222973
- Publication date Dec 4, 2003
- Kazushige Hiroi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE