Masayuki Koga

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
System and device for preventing wiretap
- Patent number 6,470,015
- Issue date Oct 22, 2002
- Fujitsu Limited
- Masayuki Koga
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication terminal and network unit in information offering sys...
- Patent number 6,226,681
- Issue date May 1, 2001
- Fujitsu Limited
- Masayuki Koga
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Synchronous transmission network system
- Publication number 20060039347
- Publication date Feb 23, 2006
- FUJITSU LIMITED
- Kazuhiko Nakamura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE