Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7624822 | Thread joint | Per-Olof Liljebrand | 2009-12-01 |
| 6484823 | Rock drill bit and a check valve therefor | Rune Sandén | 2002-11-26 |
| 6293360 | Thread joint percussive drilling equipment | Per-Olof Liljebrand | 2001-09-25 |
| 6021855 | Method, drilling tool and rock drill bit for transferring impact energy from a top hammer unit | Rainer Beccu, Per-Olof Liljebrand, Jan-Erik Sundstrom | 2000-02-08 |