Tomoyuki Awatsu

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Itami, JP

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Patents Grantslast 30 patents

Information Patent Grant
Silicon nitride sintered body and process for producing the same
- Patent number 5,173,458
- Issue date Dec 22, 1992
- Sumitomo Electric Industries, Ltd.
- Takao Nishioka
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES