Sekiji Yokota

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Fukayasu, JP

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Patents Grantslast 30 patents

Information Patent Grant
Water proofing compositions for cement mortar or concrete
- Patent number 4,338,224
- Issue date Jul 6, 1982
- Hayakawa Rubber Co., Ltd.
- Toshihiro Fujii
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Water proofing compositions for cement mortar or concrete and metho...
- Patent number 4,193,831
- Issue date Mar 18, 1980
- Hayakawa Rubber Company Limited
- Toshihiro Fujii
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Water proofing compositions for cement mortar or concrete and metho...
- Patent number 4,174,993
- Issue date Nov 20, 1979
- Hayakawa Rubber Company Limited
- Toshihiro Fujii
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Water proofing compositions for cement mortar or concrete and metho...
- Patent number 4,174,992
- Issue date Nov 20, 1979
- Hayakawa Rubber Company Limited
- Toshihiro Fujii
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES