Yuzo Yoshikuni

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Wavelength division multiplexing optical transmission system and tr...
- Patent number 7,113,702
- Issue date Sep 26, 2006
- Nippon Telegraph and Telephone Corporation
- Eiichi Yamada
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for stabilizing frequency of semiconductor laser
- Patent number 5,025,448
- Issue date Jun 18, 1991
- Nippon Telegraph & Telephone Corporation
- Shoichi Sudo
- G02 - OPTICS
Information Patent Grant
Wavelength conversion element for a semiconductor laser
- Patent number 4,856,005
- Issue date Aug 8, 1989
- Nippon Telegraph & Telephone Corporation
- Kunishige Oe
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Wavelength division multiplexing optical transmission system and tr...
- Publication number 20030030865
- Publication date Feb 13, 2003
- Nippon Telegraph and Telephone Corporation
- Eiichi Yamada
- H04 - ELECTRIC COMMUNICATION TECHNIQUE