Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4315552 | Raise drill apparatus | — | 1982-02-16 |
| 4298076 | Chuck and wrench assembly for raise drill apparatus | Dennis J. Patrick | 1981-11-03 |
| 4214445 | Hydraulic circuitry for raise drill apparatus | Neville Thompson | 1980-07-29 |