Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4550785 | Hammer | Ward D. Morrison | 1985-11-05 |
| 4420277 | Mine roof driller-bolter apparatus and method | Ward D. Morrison, Ralph C. Lumbra | 1983-12-13 |
| 4282937 | Hammer | — | 1981-08-11 |
| 4265321 | Rock drill | — | 1981-05-05 |