Norihiro Umezawa

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Kakuda-shi, Miyagi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Hydraulic cement composition and process for producing cement shapings
- Patent number 4,684,407
- Issue date Aug 4, 1987
- Mitsubishi Yuka Fine Chemicals Co., Ltd.
- Norihiro Umezawa
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES