Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4932994 | Evaporation inhibitors | Josef Koester, Adolf Asbeck, Holger Tesmann, Konrad Albrecht, Paul Bittner +1 more | 1990-06-12 |
| 4891154 | Defoaming agents and process of defoaming | Holger Tesmann, Hans-Ulrich Hempel, Heinz Mueller, Adolf Asbeck | 1990-01-02 |