Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6019581 | Friction vacuum pump with cooling arrangement | Wilhelm Walter, Heinrich Engländer | 2000-02-01 |
| 5695316 | Friction vacuum pump with pump sections of different designs | Gunter Schutz, Heinrich Engländer, Hinrich Henning | 1997-12-09 |