Toho Natural Gas Company, Limited

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Nigata, JP

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Patents Grantslast 30 patents

Information Patent Grant
Rubber modified asphalt type of water-proofing compositions
- Patent number 5,891,224
- Issue date Apr 6, 1999
- Obayashi Corporation
- Tsuyoshi Aoyama
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Rubber modified asphalt type of water-proofing compositions
- Patent number 5,866,211
- Issue date Feb 2, 1999
- Obayashi Corporation
- Tsuyoshi Aoyama
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Rubber modified asphalt type of water-proofing composition
- Patent number 5,674,313
- Issue date Oct 7, 1997
- Obayashi Corporation
- Tsuyoshi Aoyama
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...