Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6217135 | Crawler track link member | Klaus Spies | 2001-04-17 |
| 5058963 | Belt-type caterpillar for track-laying vehicles and snowmobiles | Hagen-Heinz Wiesner, Klaus Spies | 1991-10-22 |