Motoaki Kawakama

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Chiba, JP

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Patents Grantslast 30 patents

Information Patent Grant
Exposed aggregate finishing method for concrete
- Patent number 4,205,040
- Issue date May 27, 1980
- Ohbayashi-Gumi, Ltd.
- Tsuyoshi Aoyama
- B28 - WORKING CEMENT, CLAY, OR STONE