Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4732511 | Mine roof supports | — | 1988-03-22 |
| 4492495 | Roof support for use in mines | Keith D. Blackmore | 1985-01-08 |
| 4430026 | Roof support suitable for use in mines | Nigel Hill | 1984-02-07 |
| 4411558 | Roof support suitable for use in mines | — | 1983-10-25 |