Akihiko Takei

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Kumagaya, JP

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Patents Grantslast 30 patents

Information Patent Grant
Material for destroying concrete structures
- Patent number 4,409,030
- Issue date Oct 11, 1983
- Chichibu Cement Co., Ltd.
- Keiichi Minegishi
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES