Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5944395 | Connector endless track with travelling pad | Klaus Spies, Kurt Schlupp | 1999-08-31 |
| 5632538 | Drive system for a caterpillar track | Hagen-Heinz Wiesner, Klaus Spies | 1997-05-27 |