Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5996515 | Axial retainer shaft for meter roller | David Walter Gregor | 1999-12-07 |
| 5980163 | Distribution manifold for air seeder | David Walter Gregor | 1999-11-09 |
| 5924370 | Reconfigurable meter roller and blank section | David Walter Gregor | 1999-07-20 |