Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6698528 | Fertilizer coulter with trash-shedding, vibratory cleaning time | Donald T. Best, Dale S. Ryczak, John A. Lesanko | 2004-03-02 |
| 4813489 | Foldable packer harrow implement | Lawrence S. Grodecki, James W. Henry, Glenn Hantke | 1989-03-21 |
| 4793743 | Air seeder purging system | Lawrence S. Grodecki, James W. Henry, Glenn Hantke, Jack A. Lesanko | 1988-12-27 |