Issued Patents 2019
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10494873 | Roller cone bit having gland for full seal capture | Chengwei Chiu, Matthew Charles Stroever | 2019-12-03 |
| 10337272 | Hybrid roller cone and junk mill bit | Matthew Charles Stroever, Sterling Robinson | 2019-07-02 |
| 10190366 | Hybrid drill bits having increased drilling efficiency | Anton F. Zahradnik, Robert J. Buske, Rudolf Carl Pessier, Don Q. Nguyen, Karlos B. Cepeda +5 more | 2019-01-29 |