Fumiyoshi Ohkubo

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Kanagawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical demultiplexer and optical transmission system
- Patent number 7,324,756
- Issue date Jan 29, 2008
- Sumitomo Electric Industries, Ltd.
- Masato Tanaka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Optical demultiplexer and optical transmission system
- Publication number 20030214980
- Publication date Nov 20, 2003
- Masato Tanaka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE