Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11255152 | Drill hole inner tube plug | Mark J. Seilstad, Alex Christie | 2022-02-22 |
| 9611695 | Dual pipe drilling head with improved bearing retention structure | Greg L. Slaughter, Jr., Travis W. Woodson | 2017-04-04 |
| 7062901 | Variable geometry nozzle with flexible side wall | — | 2006-06-20 |
| 6981365 | Supersonic revolving nozzle | — | 2006-01-03 |