Tomoaki Hirayama

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Patents Grantslast 30 patents

Information Patent Grant
Radio communication system, frequency allocation method and frequen...
- Patent number 7,082,310
- Issue date Jul 25, 2006
- NTT Mobile Communications Networks, Inc.
- Tomoaki Hirayama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Radio communication system, frequency allocation method and frequen...
- Patent number 6,658,257
- Issue date Dec 2, 2003
- NTT DoCoMo, Inc.
- Tomoaki Hirayama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Radio communication system, frequency allocation method and frequen...
- Publication number 20040082335
- Publication date Apr 29, 2004
- Tomoaki Hirayama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE