Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8342263 | Vibratory drill head mounting and rotation coupling system | Brent Kejr | 2013-01-01 |
| 8056640 | Hydraulic head clamp assembly for mobile drill rig | Melvin P. Kejr | 2011-11-15 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8342263 | Vibratory drill head mounting and rotation coupling system | Brent Kejr | 2013-01-01 |
| 8056640 | Hydraulic head clamp assembly for mobile drill rig | Melvin P. Kejr | 2011-11-15 |