Akihiko Niizawa

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Standard materials and methods for instrumental measurement for AST...
- Patent number 5,381,227
- Issue date Jan 10, 1995
- Nippon Petroleum Refining Co., Ltd.
- Akihiko Niizawa
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Standard samples and methods of instrumental measurement of ASTM co...
- Patent number 5,139,330
- Issue date Aug 18, 1992
- Nippon Petroleum Refining Co., Ltd.
- Akihiko Niizawa
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Standard samples and methods of instrumental measurement of Saybolt...
- Patent number 5,139,329
- Issue date Aug 18, 1992
- Nippon Petroleum Refining Co., Ltd.
- Akihiko Niizawa
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...