Chanthan Winh

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical add/drop multiplexer
- Patent number 8,009,987
- Issue date Aug 30, 2011
- Hitachi, Ltd.
- Yasuhiro Uchiyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical signal changeover device and optical signal changeover method
- Patent number 7,844,177
- Issue date Nov 30, 2010
- Hitachi, Ltd.
- Chanthan Winh
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
OPTICAL REPEATER, OPTICAL TRANSMISSION APPARATUS, REFLECTION ABNORM...
- Publication number 20110164873
- Publication date Jul 7, 2011
- Hitachi, Ltd.
- YUKIO HAYASHI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical add/drop multiplexer
- Publication number 20080285973
- Publication date Nov 20, 2008
- Yasuhiro Uchiyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL SIGNAL CHANGEOVER DEVICE AND OPTICAL SIGNAL CHANGEOVER METHOD
- Publication number 20070212066
- Publication date Sep 13, 2007
- Chanthan Winh
- H04 - ELECTRIC COMMUNICATION TECHNIQUE