Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4822251 | Vacuum pump having an rpm-measuring device | Hans Amrath | 1989-04-18 |
| 4794330 | Method and circuit for measuring and displaying physical values | Hans-Hermann Klein | 1988-12-27 |