Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6986313 | Dual material agricultural delivery system for seeder | James W. Halford, Derek Christopher Opseth | 2006-01-17 |
| 5927217 | Metering particulate material | James W. Halford, Jeffrey Mark Slabik | 1999-07-27 |