Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4954017 | Expansion bolt and mine roof reinforcement | Robert L. Davis | 1990-09-04 |
| 4636115 | Expansion bolt and mine roof reinforcement therewith | Robert L. Davis | 1987-01-13 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4954017 | Expansion bolt and mine roof reinforcement | Robert L. Davis | 1990-09-04 |
| 4636115 | Expansion bolt and mine roof reinforcement therewith | Robert L. Davis | 1987-01-13 |