Issued Patents 2017
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9850723 | Drill string components having multiple-thread joints | Christopher L. Drenth | 2017-12-26 |
| 9810029 | Drill string components resistant to jamming | Christopher L. Drenth | 2017-11-07 |