Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4290490 | Roof bolting device | William R. Cobb | 1981-09-22 |
| 4256186 | Roof drilling and bolting apparatus | William R. Cobb | 1981-03-17 |
| 4252475 | Vehicle mounted temporary roof support | William R. Cobb | 1981-02-24 |
| 4250975 | Cab mounting for mining machine | William R. Cobb | 1981-02-17 |