Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8567113 | Pest control for burrowing animals | Murray Pask | 2013-10-29 |
| 6986313 | Dual material agricultural delivery system for seeder | Frederick Nicholas Butuk, Derek Christopher Opseth | 2006-01-17 |
| 6142085 | Hydraulic compression system for seeder | Kenneth Wayne Drever, Derek Christopher Opseth, William Robin Nell | 2000-11-07 |
| 5947209 | Ground working implement including a shank and a tip | Christopher J. Halford | 1999-09-07 |
| 5927217 | Metering particulate material | Jeffrey Mark Slabik, Frederick Nicholas Butuk | 1999-07-27 |
| 5021030 | Straw spreader for a combine harvester and method of spreading | William B. Reed | 1991-06-04 |
| 4762075 | Seed/fertilizer minimum tillage planter | — | 1988-08-09 |