Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7559752 | Dual-shaft vacuum pump | Rudolf Bahnen, Josef Hodapp | 2009-07-14 |
| 6682324 | Radial turbo-blower | Josef Hodapp, Hans Kriechel | 2004-01-27 |
| 5944049 | Apparatus and method for regulating a pressure in a chamber | Christian Beyer, Keith Trenton, Mariusch Gregor, Robert Stolle, Rudolph Bahnen +4 more | 1999-08-31 |
| 5044895 | Oil supply device for a rotary machine | Peter Frieden, Heinz Frings | 1991-09-03 |
| 4974318 | Method of making a dual-shaft machine | Josef Heppekausen, Hans-Peter Kabelitz, Ralf Steffens | 1990-12-04 |
| 4917583 | Bearing support for a twin-shaft pump | Heinz Frings, Ralf Steffens | 1990-04-17 |
| 4639199 | Two-shaft vacuum pump with internal compression | Heinz Frings, Hans-Peter Kabelitz | 1987-01-27 |
| 4632650 | Vacuum pump having an evacuated gear chamber | Peter Frieden, Hans-Peter Kabelitz, Jorg Thielicke | 1986-12-30 |
| 4470767 | Vacuum pump with overload protection valve | Heinz Frings | 1984-09-11 |