Yukio Koumura

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical fiber preform and the method of producing the same
- Patent number 7,135,235
- Issue date Nov 14, 2006
- The Furukawa Electric Co., Ltd.
- Yukio Koumura
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Optical fiber preform and the method of producing the same
- Patent number 6,827,883
- Issue date Dec 7, 2004
- The Furukawa Electric Co., Ltd.
- Yukio Koumura
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Optical fiber base material, its manufacturing method and optical f...
- Patent number 6,823,125
- Issue date Nov 23, 2004
- The Furukawa Electric Co., Ltd.
- Yukio Koumura
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Optical fiber preform
- Patent number 6,542,680
- Issue date Apr 1, 2003
- The Furukawa Electric Co., Ltd.
- Yukio Koumura
- C03 - GLASS MINERAL OR SLAG WOOL

Patents Applicationslast 30 patents

Information Patent Application
Optical fiber preform and the method of producing the same
- Publication number 20050214543
- Publication date Sep 29, 2005
- The Furukawa Electric CO., LTD
- Yukio Koumura
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
Optical fiber base material, its manufacturing method and optical f...
- Publication number 20030063880
- Publication date Apr 3, 2003
- THE FURUKAWA ELECTRIC CO., LTD.
- Yukio Koumura
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Application
Optical fiber preform and the method of producing the same
- Publication number 20030053778
- Publication date Mar 20, 2003
- THE FURUKAWA ELECTRIC CO., LTD.
- Yukio Koumura
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Application
Optical fiber preform
- Publication number 20020057879
- Publication date May 16, 2002
- The Furukawa Electric CO., LTD
- Yukio Koumura
- C03 - GLASS MINERAL OR SLAG WOOL