Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5362217 | Helical positive-displacement machine having a meandering sealing strip groove | Roland Kolb, Fritz Spinnler | 1994-11-08 |
| 5318425 | Displacement machine according to the spiral principle | Roland Kolb, Fritz Spinnler | 1994-06-07 |