Klaus Perrey

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Bonn-Bad, DE

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Patents Grantslast 30 patents

Information Patent Grant
N,N'-Disubstituted piperazine derivative
- Patent number 4,221,793
- Issue date Sep 9, 1980
- Hoechst Aktiengesellschaft
- Rolf-Ortwin Weber
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Analgesic phosphinyl compounds and compositions
- Patent number 4,160,828
- Issue date Jul 10, 1979
- Hoechst Aktiengesellschaft
- Alfons Soder
- C07 - ORGANIC CHEMISTRY