Keiji Hasegawa

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Higashimurayama-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
CDMA communication system and its transmission power control method
- Patent number 7,006,463
- Issue date Feb 28, 2006
- Hitachi, Ltd.
- Katsuhiko Tsunehara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
CDMA communication system and its transmission power control method
- Patent number 6,483,816
- Issue date Nov 19, 2002
- Hitachi, Ltd.
- Katsuhiko Tsunehara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
CDMA communication system and its transmission power control method
- Patent number 6,307,844
- Issue date Oct 23, 2001
- Hitachi, Ltd.
- Katsuhiko Tsunehara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Wireless communication system and its transmission power control me...
- Publication number 20080170555
- Publication date Jul 17, 2008
- Hitachi Communication Technologies, Ltd.
- Katsuhiko Tsunehara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CDMA communication system and its transmission power control method
- Publication number 20080045261
- Publication date Feb 21, 2008
- Hitachi Communication Technologies, Ltd.
- Katsuhiko Tsunehara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CDMA communication system and its transmission power control method
- Publication number 20060092886
- Publication date May 4, 2006
- Hitachi, Ltd.
- Katsuhiko Tsunehara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CDMA communication system and its transmission power control method
- Publication number 20030053426
- Publication date Mar 20, 2003
- Hitachi, Ltd.
- Katsuhiko Tsunehara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CDMA communication system and its transmission power control method
- Publication number 20010012276
- Publication date Aug 9, 2001
- Hitachi, Ltd.
- Katsuhiko Tsunehara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE