Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4700785 | Furrow opener assembly with integral down-pressure adjustment | Ronald M. Steilen, Vernon E. Rettig | 1987-10-20 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4700785 | Furrow opener assembly with integral down-pressure adjustment | Ronald M. Steilen, Vernon E. Rettig | 1987-10-20 |