Issued Patents 2019
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10494873 | Roller cone bit having gland for full seal capture | Chengwei Chiu, Johnathan Howard | 2019-12-03 |
| 10337272 | Hybrid roller cone and junk mill bit | Johnathan Howard, Sterling Robinson | 2019-07-02 |