Wolfgang Frey

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Munchenstein, CH

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Patents Grantslast 30 patents

Information Patent Grant
Anthraquinone compounds
- Patent number 4,267,115
- Issue date May 12, 1981
- Sandoz Ltd.
- Wolfgang Frey
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...