Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6986313 | Dual material agricultural delivery system for seeder | James W. Halford, Frederick Nicholas Butuk | 2006-01-17 |
| 6142085 | Hydraulic compression system for seeder | Kenneth Wayne Drever, James W. Halford, William Robin Nell | 2000-11-07 |