Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12173584 | Drive device for rotatable operation of a drill bit of a down-the-hole hammer | Fredrik Egerstrom, Martin Öhnström, Magnus Fridsell | 2024-12-24 |
| 9453403 | Method and arrangement to establish during down-the-hole drilling communication between the cavity of the drill string and the surrounding material | — | 2016-09-27 |
| 9016408 | Drill bit for a down-the-hole drill | Peter F. Johansson | 2015-04-28 |
| 8992130 | Arrangement for a down-the-hole hammer drill for use in soil consolidation through jet grouting | Peter F. Johansson | 2015-03-31 |