Issued Patents 2011
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8028770 | Conformal bearing for rock drill bit | Aaron J. Dick, Chih Lin, Anton F. Zahradnik, Daniel E. Scott, Don Q. Nguyen +4 more | 2011-10-04 |
| 7975779 | Threaded cone retention system for roller cone bits | Anton F. Zahradnik, Don Q. Nguyen, Eric C. Sullivan, Aaron J. Dick, Scott Shiqiang Shu | 2011-07-12 |
| 7914006 | Drilling tool with elastomer seal having graded properties | Redd H. Smith | 2011-03-29 |