Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5449047 | Automatic control of drilling system | — | 1995-09-12 |
| 5324051 | Fluid-assisted dust seal | — | 1994-06-28 |
| 5269386 | Self positioning dust seal holder | Stuart A. Connell | 1993-12-14 |
| 5201816 | Side angle drilling apparatus | — | 1993-04-13 |
| 4953639 | Closed loop hydraulic drill feed system | Jeffrey W. Hamner | 1990-09-04 |
| 4892160 | Drill pipe transfer arm for angle drilling | Calvin Moore | 1990-01-09 |
| 4834441 | Drill pipe handling device | — | 1989-05-30 |
| 4275793 | Automatic control system for rock drills | Peter L. Madonna | 1981-06-30 |