Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7182152 | Sampling isolator | — | 2007-02-27 |
| 7182155 | Locking split barrel sampler and soil sampling system | — | 2007-02-27 |
| 6739410 | Sonic drill head | Brian Smith | 2004-05-25 |
| 6073659 | Method and apparatus of removing liquid from underground cavity by directional drilling | — | 2000-06-13 |
| 6003619 | Back driving automatic hammer | — | 1999-12-21 |
| 5782310 | Dry hollow stem augers | — | 1998-07-21 |
| 5647442 | Drill rig with carrier/mast safety interlock | — | 1997-07-15 |
| 5524713 | Drill rig having alternate spindle drive | — | 1996-06-11 |
| 5360072 | Drill rig having automatic spindle stop | — | 1994-11-01 |