Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5038874 | Drill bit having a flushing medium channel | Lars K. Larsson | 1991-08-13 |
| 4961469 | Drill string element | Kenneth Larsson | 1990-10-09 |
| 4805705 | Drill bit | Bernt S. Liljekvist | 1989-02-21 |