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Shigeyuki Soumiya
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Setagaya-Ku, Tokyo, JP
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Patent Grant
Hydrothermal process for preparing zirconia-alumina base ultra-fine...
Patent number
4,769,351
Issue date
Sep 6, 1988
Chichibu Cement Co., Ltd.
Shigeyuki Soumiya
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES