Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4432710 | Rotary type machine with check valves for relieving internal pressures | Christian B. Hansen | 1984-02-21 |
| 4372413 | Hydrostatic steering device | Hans Christian Petersen, Erik Kyster, Svend E. Thomsen | 1983-02-08 |