Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5040314 | Stress relief for walking dragline frames | — | 1991-08-20 |
| 4769932 | Walking dragline excavator frames with torsion resistant tubular-web rail girders and other improvements | — | 1988-09-13 |
| 4611440 | Walking dragline base frame and revolving frame construction | — | 1986-09-16 |
| 4329795 | Load stress relief for walking dragline excavator base frames | — | 1982-05-18 |