Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8894328 | Mine roof bolt assembly | Gregory E. Smith | 2014-11-25 |
| 4516883 | Mine roof bolt mounting assembly | — | 1985-05-14 |
| 4507020 | Mine roof bearing plate | David C. Liber | 1985-03-26 |