Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6126378 | Multi-purpose, low-load angle trailer with laterally extendable winch arms | Donald R. Landoll, Loren F. Wassenberg | 2000-10-03 |
| 4556357 | Truck having articulated chassis for hauling goods | Donald R. Landoll, Alfred R. Belknap | 1985-12-03 |
| 4492507 | Actuator for shiftable undercarriage of tiltable trailer | Donald R. Landoll, Alfred R. Belknap | 1985-01-08 |
| 4361191 | Seedbed preparation implement | Donald R. Landoll | 1982-11-30 |