Issued Patents 2019
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10392877 | Chuck for a drill head of a rotation drilling rig | Jan Hanna, Karolina Årdh | 2019-08-27 |
| 10174555 | Drilling rig and drill head of a drilling rig | Jan Hanna, Jim Gryler | 2019-01-08 |