Sadao Yamamoto

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Yokohama, JA

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Patents Grantslast 30 patents

Information Patent Grant
Process of continuous manufacture of light-weight foamed concrete
- Patent number 4,057,608
- Issue date Nov 8, 1977
- Showa Denko Kabushiki Kaisha
- Akihiro Hashimoto
- B28 - WORKING CEMENT, CLAY, OR STONE