Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5375670 | Drill string component for drilling with a liquid driven drilling machine | Berndt Ekwall, Kurt Andersson | 1994-12-27 |
| 5318140 | Fluid operated drill apparatus | Berndt Ekwall, Torbjorn Jakobsson | 1994-06-07 |
| 5279371 | Down-the-hole drilling machine | Berndt Ekwall, Torbjorn Jakobsson | 1994-01-18 |