Sampei Kemmochi

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Hakodate, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of preparing green compositions containing a hydraulic subst...
- Patent number 4,299,633
- Issue date Nov 10, 1981
- Ito; Yasuro
- Yasuro Ito
- B28 - WORKING CEMENT, CLAY, OR STONE