Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE34167 | Drill bit and roller cutter for said drill bit | Michael Mattsson | 1993-01-26 |
| 4832136 | Drill bit and roller cutter for said drill bit | Michael Mattsson | 1989-05-23 |
| 4572307 | Rock drill | — | 1986-02-25 |