Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4611817 | Heavy transport bolster construction | Donald C. Harlander, Ralph O. Hughes | 1986-09-16 |
| 4579182 | Steerable, track-type vehicle for bulky loads | Donald C. Harlander, Ralph O. Hughes | 1986-04-01 |
| 4222581 | Apparatus and method for moving a large object | Walter L. Treadwell | 1980-09-16 |
| 4188887 | Multi-directional crane truck | Donald C. Harlander, Ralph O. Hughes | 1980-02-19 |