Hisatoshi Ohtsuka

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Niigata-ken, JP

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Patents Grantslast 30 patents

Information Patent Grant
Synthetic fused silica member, method for producing the same and op...
- Patent number 6,351,972
- Issue date Mar 5, 2002
- Shin-Etsu Chemical Co., Ltd.
- Hisatoshi Ohtsuka
- C03 - GLASS MINERAL OR SLAG WOOL