Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4806686 | Preparation of ribitylxylidine | Hansgeorg Ernst, Hartmut Leininger | 1989-02-21 |
| 4804670 | Substituted hexatriene derivatives and their use in treating acne and psoriasis | Hans-Heiner Wuest, Fritz-Frieder Frickel, Klaus Schmieder, Axel Nuerrenbach | 1989-02-14 |