Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5350274 | Self-cleaning side channel machine having at least one impeller rotatably mounted in the housing of the machine | Norbert Aust | 1994-09-27 |
| 5299916 | Liquid-ring pump having an outlet means including a noise reducing flexible membrane | — | 1994-04-05 |