Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5108271 | Multiple connection for rotation vacuum pumps | Hanns-Peter Berges | 1992-04-28 |
| 5049050 | Method for operating a twin shaft vacuum pump according to the Northey principle and a twin shaft vacuum pump suitable for the implementation of the method | Hanns-Peter Berges | 1991-09-17 |
| 5035585 | Multiple connector for rotation vacuum pumps | Hanns-Peter Berges | 1991-07-30 |
| 4983107 | Multistage rotary piston vacuum pump having sleeves to fix shaft positions | Ralf Steffens, Hans-Peter Kabelitz, Hanns-Peter Berges | 1991-01-08 |
| 4940398 | Twin-shaft, multiple-stage vacuum pump with the shafts vertically disposed | Hanns-Peter Berges, Hartmut Kriehn, Ralf Steffens | 1990-07-10 |
| 4886599 | Filter cartridge with series elements for chemical and mechanical filtration | Paul Bachmann, Hanns-Peter Berges | 1989-12-12 |
| 4612957 | Vacuum pump and trap combination | Lutz Arndt, Paul Bachmann, Hanns-Peter Berges, Dieter Vorberg | 1986-09-23 |
| 4588504 | Oil circuit coupler for an oil-sealed vacuum pump | Hanns-Peter Berges | 1986-05-13 |
| 4525129 | Oil-sealed vacuum pump | Hanns-Peter Berges, Peter Frieden | 1985-06-25 |