Kazuko Hamaguchi

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Service reservation system
- Patent number 7,328,167
- Issue date Feb 5, 2008
- Hitachi, Ltd.
- Kazuhiro Kusama
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Charging method and terminal equipment in the information and commu...
- Patent number 7,016,665
- Issue date Mar 21, 2006
- Hitachi, Ltd.
- Tsuyoshi Tamaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Charging method and terminal equipment in the information and commu...
- Patent number 6,675,007
- Issue date Jan 6, 2004
- Hitachi, Ltd.
- Tsuyoshi Tamaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Attribute Certificate Verification Method and System
- Publication number 20080016335
- Publication date Jan 17, 2008
- Aya Takahashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Charging method and terminal equipment in the information and commu...
- Publication number 20030054795
- Publication date Mar 20, 2003
- Hitachi, Ltd.
- Tsuyoshi Tamaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Charging method and terminal equipment in the information and commu...
- Publication number 20030054796
- Publication date Mar 20, 2003
- Hitachi, Ltd.
- Tsuyoshi Tamaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Communication method and communication system for controlling with...
- Publication number 20020090953
- Publication date Jul 11, 2002
- Maki Aburai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE