Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5259572 | Towing vehicle without draw tongue for towing aircraft | Wilhelm Franken, Ernest Kretschmann, Gerhard Weigardt, Heinrich Goris, Torsten L. Michaelsen | 1993-11-09 |
| 5054714 | Aircraft tractor without tow-bar with adjustable tow arms | Wilhelm Franken, Lars T. Michaelsen | 1991-10-08 |
| 5051052 | Aircraft tractor without tow-bar | Wilhelm Franken, Lars T. Michaelsen | 1991-09-24 |