Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6003622 | Drill tube for use in upward rock drilling | — | 1999-12-21 |
| 5785360 | Thread coupling for drill string elements for percussive drilling | Leif Nordfeldt | 1998-07-28 |
| 5259469 | Drilling tool for percussive and rotary drilling | Uno S. Lof | 1993-11-09 |