Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10626684 | Handling and recovery devices for tubular members and associated methods | Christopher L. Drenth, Anthony Lachance | 2020-04-21 |
| 10119344 | Handling and recovery devices for tubular members and associated methods | Christopher L. Drenth, Anthony Lachance | 2018-11-06 |
| 9932775 | Drill rod having internally projecting portions | Christopher L. Drenth | 2018-04-03 |
| 9784038 | High-productivity drill bits | Michael L. Case, Tushar Matkar | 2017-10-10 |
| 9546524 | Handling and recovery devices for tubular members and associated methods | Christopher L. Drenth, Anthony Lachance | 2017-01-17 |
| 6431407 | Container filling device | Donald R. Oehrlein | 2002-08-13 |
| 6145709 | Container filling device | Donald R. Oehrlein | 2000-11-14 |