Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4207691 | Four-wheel drive scraper with main propulsion at rear axle | Walter E. Lott, Clifford E. Johnson | 1980-06-17 |
| 4207692 | Two engine four-wheel drive scraper with main propulsion at rear axle | Walter E. Lott, Clifford E. Johnson | 1980-06-17 |