Takeo Ohwada

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Ibaraki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Resin composition for cement
- Patent number 5,109,088
- Issue date Apr 28, 1992
- Hitachi Chemical Company Ltd.
- Takeo Ohwada
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Process for producing graft copolymer
- Patent number 5,087,675
- Issue date Feb 11, 1992
- Hitachi Chemical Company, Ltd.
- Ohwada Takeo
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Concrete-protective material
- Patent number 5,075,404
- Issue date Dec 24, 1991
- Hitachi Chemical Company, Ltd.
- Takeo Ohwada
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Process for producing graft copolymer
- Patent number 4,923,929
- Issue date May 8, 1990
- Hitachi Chemical Co.
- Takeo Ohwada
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...