Haruyoshi Koga

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Hachinohe, JP

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Patents Grantslast 30 patents

Information Patent Grant
Repairing mortars for silicon carbide bricks
- Patent number 4,249,947
- Issue date Feb 10, 1981
- Hachinohe Smelting Co., Ltd.
- Haruyoshi Koga
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES