Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5769609 | Liquid ring compressor having a distribution groove for sealing | Goerg Plescher, Robert Siebenwurst | 1998-06-23 |
| 5647728 | Liquid ring machine having pivoted outer housing | Robert Siebenwurst, Hans Kuhn | 1997-07-15 |