Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12241313 | Connection for percussion drilling | John Hammargren | 2025-03-04 |
| 12044077 | Elliptical design for male thread clearance | Tomas Jansson, Anders NORDBERG | 2024-07-23 |
| 11162619 | Drill rod or adaptor with strengthened spigot coupling | Petri Ahola, David E. Wickstrom | 2021-11-02 |
| 10627023 | Threaded coupling end for a percussion drill string component | David E. Wickstrom | 2020-04-21 |