Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5259469 | Drilling tool for percussive and rotary drilling | Karl-Axel Stjernstrom | 1993-11-09 |
| 4817741 | Rotary drill | — | 1989-04-04 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5259469 | Drilling tool for percussive and rotary drilling | Karl-Axel Stjernstrom | 1993-11-09 |
| 4817741 | Rotary drill | — | 1989-04-04 |