Kenji Fujiwara

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Bizen, JP

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Patents Grantslast 30 patents

Information Patent Grant
Silicon nitride composite refractories
- Patent number 4,540,674
- Issue date Sep 10, 1985
- Kyushu Refractories Co., Ltd.
- Akira Watanabe
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES