Daiichirou Tanaka

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Patents Grantslast 30 patents

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Erbium-doped silica optical fiber preform
- Patent number 5,526,459
- Issue date Jun 11, 1996
- Fujikura Ltd.
- Daiichirou Tanaka
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Solution doping of a silica preform with erbium, aluminum and phosp...
- Patent number 5,474,588
- Issue date Dec 12, 1995
- Fujikura Ltd.
- Daiichirou Tanaka
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Optical fiber having a core with a repeatedly changing constitution...
- Patent number 5,267,339
- Issue date Nov 30, 1993
- Fujikura Ltd.
- Ryozo Yamauchi
- G02 - OPTICS