Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5695316 | Friction vacuum pump with pump sections of different designs | Gunter Schutz, Friedrich von Schulz-Hausmann, Hinrich Henning | 1997-12-09 |
| 5662456 | Friction vacuum pump with bearing support | — | 1997-09-02 |