Wolfgang Helfrich

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Berlin, DE

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Patents Grantslast 30 patents

Information Patent Grant
Switchable columnar liquid-crystalline systems
- Patent number 5,384,068
- Issue date Jan 24, 1995
- Hoechst Aktiengesellschaft
- Harald Bock
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...