Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6766869 | Remote lock-out system and method for a horizontal directional drilling machine | Ivan R. Brand, Scott E. Kilborn, Gregg Austin | 2004-07-27 |
| 6755263 | Underground drilling device and method employing down-hole radar | Kevin L. Alft, Brian John Bischel, Gregg Austin | 2004-06-29 |
| 6719069 | Underground boring machine employing navigation sensor and adjustable steering | Kevin L. Alft, Gregory W. Draper | 2004-04-13 |