Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4243106 | Device for setting blade of earthmover | Rudolf Perkert, Karl-Heinz Fischer | 1981-01-06 |
| 4205904 | Detection and indication device | Rudolf Perkert, Karl-Heinz Fischer | 1980-06-03 |