Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4827800 | Multi-groove and spline connection between gear shaft of a rotary piston machine with internal axis and method of making such a multigroove spline connection | Ivar Rasmussen | 1989-05-09 |
| 4828272 | Sealing apparatus with elastic seal ring and plastic slide ring | — | 1989-05-09 |