Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9187960 | Expandable reamer tools | Steven R. Radford, Les T. Shale, Mark E. Morris, Mark R. Kizziar, Anton F. Zahradnik | 2015-11-17 |
| 8028770 | Conformal bearing for rock drill bit | Aaron J. Dick, Chih Lin, Terry J. Koltermann, Anton F. Zahradnik, Daniel E. Scott +4 more | 2011-10-04 |
| 7975779 | Threaded cone retention system for roller cone bits | Anton F. Zahradnik, Don Q. Nguyen, Eric C. Sullivan, Terry J. Koltermann, Aaron J. Dick | 2011-07-12 |
| 7861805 | Conformal bearing for rock drill bit | Aaron J. Dick, Chih Lin, Terry J. Kolterman, Anton F. Zahradnik, Dan E. Scott +4 more | 2011-01-04 |
| 7387177 | Bearing insert sleeve for roller cone bit | Anton F. Zahradnik, Terry J. Koltermann, Don Q. Nguyen, Aaron J. Dick, Eric C. Sullivan | 2008-06-17 |