Issued Patents 2020
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10774593 | Sealing elements for roller cone bits | Shiwei Qin, Douglas Caraway | 2020-09-15 |
| 10619419 | Drill bit having improved journal bearings | Mark E. Williams, Jay S. Bird, Young-Ho Lee | 2020-04-14 |