Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7712554 | Percussive drill bit provided with an improved chuck assembly | — | 2010-05-11 |
| 7469751 | Pneumatic hammer | — | 2008-12-30 |
| 7198120 | Down-the-hole drill assembly | — | 2007-04-03 |
| 6550554 | Rock drill | — | 2003-04-22 |
| 6543557 | Drill hammer assembly | — | 2003-04-08 |
| 5915483 | Down the hole drill | — | 1999-06-29 |
| 5377772 | Drill string shock absorbers | — | 1995-01-03 |
| 5080179 | Down the hole hammer equipment | Abraham Gien | 1992-01-14 |
| 5065823 | Extraction device for pneumatically actuated drilling tools | Abraham Gien | 1991-11-19 |
| 4753302 | Valveless pneumatic hammer | Abraham Gien | 1988-06-28 |
| 4610314 | Truck mounted drilling machine | — | 1986-09-09 |
| 4591004 | Pneumatic percussion machine | — | 1986-05-27 |
| 4402370 | Valveless pneumatic hammer | Abraham Gein | 1983-09-06 |