Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10626681 | Drill rod having internally projecting portions | Christopher L. Drenth | 2020-04-21 |
| 10024117 | Drill rod having internally projecting portions | Christopher L. Drenth | 2018-07-17 |
| 8146836 | Device for carrying and dispensing scent | — | 2012-04-03 |