Hachiro Kubota

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Tokyo, JA

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Patents Grantslast 30 patents

Information Patent Grant
Expansive cement additive and process for producing the same
- Patent number 3,947,288
- Issue date Mar 30, 1976
- Onoda Cement Co., Ltd.
- Toshio Kawano
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES