Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5069294 | Stub-shaft powered spinning tiller | Franz-Josef Robert, Bernd Gattermann | 1991-12-03 |
| 5069295 | Soil cultivating machine | Franz-Josef Robert | 1991-12-03 |
| 4889190 | Soil working machine | Franz-Josef Robert | 1989-12-26 |
| 4390070 | Soil working machine | — | 1983-06-28 |
| 4235294 | Soil cultivating machine | — | 1980-11-25 |
| 4202415 | Soil cultivating machine | — | 1980-05-13 |