Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7185721 | Male portion, drill bit and threaded joint for percussive rock drilling | Bo Carlstrom, Christer Lundberg, Per-Olof Liljebrand | 2007-03-06 |
| 5284216 | Down-the-hole drill tool for drilling in advance of a casing tube | Jan-Gunnar Hedlund, Kjell Jansson, Bengt Asberg | 1994-02-08 |