Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10024107 | Rotary drill bit | Srinidhi Bangalore Gopalakrishna, James W. Langford, Jr. | 2018-07-17 |
| 9822589 | Rotary drill bit air/water separator | Srinidni Bangalore Gopalakrishna, Austen Morgan Schwend | 2017-11-21 |
| 8844656 | Seal assembly for a rotary earth bit | — | 2014-09-30 |
| 8267120 | Control valve assembly for load carrying vehicles | Lawrence J. Fry, Joseph W. Lehmann, Michael P. Haskin | 2012-09-18 |
| 8205483 | Residual life indicator | Christopher J. Karwacki, David Friday, Marc Shrewsbury | 2012-06-26 |
| 7992657 | Earth bit having a wear ring | — | 2011-08-09 |
| 7980269 | Control valve assembly for load carrying vehicles | Lawrence J. Fry, Joseph W. Lehmann, Michael P. Haskin | 2011-07-19 |
| 7975782 | Earth bit having a pressure relief valve | — | 2011-07-12 |
| 7798254 | Earth bit with hub and thrust units | Anthony D. Podnieks, Tim Chu, Elisabeth C. Smith, Janice David | 2010-09-21 |
| 7708090 | Excluder ring for earth-boring bit | Anton F. Zahradnik, Gregory L. Ricks, Don Q. Nguyen, Chih Lin, Terry J. Koltermann | 2010-05-04 |
| 6513607 | Metal-face-seal rock bit | Howard J. Walk | 2003-02-04 |