Issued Patents 2002
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6497296 | Anchoring system for a directional drilling machine and methods of use | Michael Lee McGriff | 2002-12-24 |
| 6491115 | Directional drilling machine and method of directional drilling | Mark Van Houwelingen, Randy R. Runquist, Mark Robert Stelter, Gregg Austin | 2002-12-10 |
| 6470976 | Excavation system and method employing adjustable down-hole steering and above-ground tracking | Kevin L. Alft, Gregg Austin, Hans Kelpe | 2002-10-29 |
| 6382330 | Apparatus and method for controlling an underground boring machine | James Richard Rankin | 2002-05-07 |