Hiroyuki Yamakawa

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Yamato, JP

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Patents Grantslast 30 patents

Information Patent Grant
Concrete composition for underwater use
- Patent number 4,743,301
- Issue date May 10, 1988
- Takenaka Komuten Co., Ltd.
- Koichi Ito
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Cement composition for laying underwater
- Patent number 4,508,572
- Issue date Apr 2, 1985
- Takenaka Komuten Co., Ltd.
- Masaharu Sakuta
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES