Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5693669 | Tilidine dihydrogen orthophosphate, method of preparing it and pharmaceutical preparation containing it | Armin Knapp, Hans Klausmann | 1997-12-02 |
| 5661906 | Method of welding comb-shaped sealing strips to plate heat exchangers | Albert Beier | 1997-09-02 |