Hideaki Tushima

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical switching apparatus with optical reflection monitor and ref...
- Patent number 7,542,672
- Issue date Jun 2, 2009
- Hitachi, Ltd.
- Sunao Kakizaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Optical switching apparatus with optical reflection monitor and ref...
- Publication number 20070223918
- Publication date Sep 27, 2007
- Sunao Kakizaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical switching apparatus with optical reflection monitor and ref...
- Publication number 20030026524
- Publication date Feb 6, 2003
- Sunao Kakizaki
- G02 - OPTICS