Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4808067 | Rotary vacuum pump | — | 1989-02-28 |
| 4806074 | High-vacuum pump having a bell-shaped rotor | Heinz-Dieter Burger | 1989-02-21 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4808067 | Rotary vacuum pump | — | 1989-02-28 |
| 4806074 | High-vacuum pump having a bell-shaped rotor | Heinz-Dieter Burger | 1989-02-21 |