Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4964785 | Pump assembly | Siegfried Schoenwald, Eberhard Breyer | 1990-10-23 |
| 4657487 | Vacuum generating apparatus including liquid ring pump, pre-separator, two heat exchangers and fine separator | Siegfried Schonwald, Norbert Schmid | 1987-04-14 |
| 4194527 | Pressure limiting valve | Siegfried Schonwald, Eberhard Breyer | 1980-03-25 |