Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4796550 | Single angled blade coulter and fertilizer opener | Donald R. Hartwig | 1989-01-10 |
| 4359105 | Soil working implement including hydraulic centering and locking means for caster wheel | — | 1982-11-16 |
| 4207952 | Plow | — | 1980-06-17 |