Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6845825 | Method and apparatus for attaching/detaching drill rod | Mark Van Howelingen, Mark Robert Stelter, Trail Price, Peter C. Rozendaal | 2005-01-25 |
| 6755263 | Underground drilling device and method employing down-hole radar | Kevin L. Alft, Gregg Austin, Hans Kelpe | 2004-06-29 |
| 6557651 | Automated lubricant dispensing system and method for a horizontal directional drilling machine | Duane E. Norby, Steven C. Erickson, Gregg Austin, Scott Rempe | 2003-05-06 |
| 6554082 | Apparatus and method for controlling an underground boring machine | James Richard Rankin | 2003-04-29 |
| 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 |
| 6289997 | Apparatus and method for controlling an underground boring machine | James Richard Rankin | 2001-09-18 |
| 6109367 | Apparatus and method for controlling an underground boring machine | James Richard Rankin | 2000-08-29 |
| 5944121 | Apparatus and method for controlling an underground boring machine | James Richard Rankin | 1999-08-31 |
| 5746278 | Apparatus and method for controlling an underground boring machine | James Richard Rankin | 1998-05-05 |