Kazuyori UMEMATSU

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Communication system and time synchronization method
- Patent number 8,712,244
- Issue date Apr 29, 2014
- Hitachi, Ltd.
- Makoto Hasegawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
COMMUNICATION SYSTEM AND TIME SYNCHRONIZATION METHOD
- Publication number 20120057865
- Publication date Mar 8, 2012
- Hitachi, Ltd
- Makoto HASEGAWA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical Branching Apparatus and Passive Optical Network System
- Publication number 20090304388
- Publication date Dec 10, 2009
- Kazuyori UMEMATSU
- H04 - ELECTRIC COMMUNICATION TECHNIQUE