Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4826944 | Polyurethane casting resins | Bert Gruber, Alfred Meffert, Roland Gruetzmacher | 1989-05-02 |
| 4797222 | Foam inhibitor mixture | Karl Schmid, Adolf Asbeck, Uwe Held | 1989-01-10 |