Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5028342 | Drilling mud additives based on a polymer mixture, their use, and a process for their production | Heinz Mueller, Claus-Peter Herold, Stephan von Tapavicza | 1991-07-02 |