Tadao Edahiro

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Ibaraki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of producing rod-shaped base material for optical transmissi...
- Patent number 4,421,539
- Issue date Dec 20, 1983
- Nippon Telegraph & Telephone Public Corporation
- Tadao Edahiro
- C03 - GLASS MINERAL OR SLAG WOOL