Minoru Sirasawa

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Oumi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Cement retarder and rapid hardening cement containing the same
- Patent number 4,190,454
- Issue date Feb 26, 1980
- Denki Kagaku Kogyo Kabushiki Kaisha
- Hirosi Yamagisi
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES