Ryo Kawahara

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Chiyoda-ku, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical amplifying method, optical amplifying apparatus, and optica...
- Patent number 7,511,883
- Issue date Mar 31, 2009
- The Furukawa Electric Co., Ltd.
- Ryo Kawahara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical amplifying method, optical amplifying apparatus, and optica...
- Patent number 7,333,262
- Issue date Feb 19, 2008
- The Furukawa Electric Co., Ltd.
- Ryo Kawahara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
OPTICAL AMPLIFYING METHOD, OPTICAL AMPLIFYING APPARATUS, AND OPTICA...
- Publication number 20080068700
- Publication date Mar 20, 2008
- The Furukawa Electric CO., LTD
- Ryo Kawahara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical amplifying method, optical amplifying apparatus, and optica...
- Publication number 20040156094
- Publication date Aug 12, 2004
- The Furukawa Electric CO., LTD
- Ryo Kawahara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE