Issued Patents All Time
Showing 26–43 of 43 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7241049 | Micropore engagement surfaces for earth boring bit | Eric C. Sullivan | 2007-07-10 |
| 7234541 | DLC coating for earth-boring bit seal ring | Danny E. Scott, Aaron J. Dick | 2007-06-26 |
| 7182162 | Shirttails for reducing damaging effects of cuttings | Christopher C. Beuershausen, Raul E. Lema, Ronald Hales, Don Q. Nguyen, Gregory L. Ricks +6 more | 2007-02-27 |
| 7128171 | Hydrodynamic pump passages for rolling cone drill bit | Aaron J. Dick | 2006-10-31 |
| 7128173 | PCD face seal for earth-boring bit | — | 2006-10-31 |
| 7066286 | Gage surface scraper | Don Q. Nguyen, Terry J. Koltermann, Gregory L. Ricks, Mark E. Morris, Chris M. McCarty | 2006-06-27 |
| 7066287 | Mud debris diverter for earth-boring bit | — | 2006-06-27 |
| 6834865 | Horizontal balance control system of motor vehicle | — | 2004-12-28 |
| 6684966 | PCD face seal for earth-boring bit | Terry J. Koltermann, Danny E. Scott | 2004-02-03 |
| 6626251 | Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations | Eric C. Sullivan, Theodore E. Zaleski, Jr., Scott Ray Schmidt, Don Q. Nguyen, Glenn R. Zadrapa | 2003-09-30 |
| 6543312 | Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations | Eric C. Sullivan, Theodore E. Zaleski, Jr., Scott Ray Schmidt, Don Q. Nguyen, Glenn R. Zadrapa | 2003-04-08 |
| 6540033 | Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations | Eric C. Sullivan, Theodore E. Zaleski, Jr., Scott Ray Schmidt, Don Q. Nguyen, Glenn R. Zadrapa | 2003-04-01 |
| 6450271 | Surface modifications for rotary drill bits | Gordon A. Tibbitts, Danny E. Scott, James L. Overstreet, Terry J. Kolterman, James Andy Oxford +1 more | 2002-09-17 |
| 6419032 | Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations | Eric C. Sullivan, Theodore E. Zaleski, Jr., Scott Ray Schmidt, Don Q. Nguyen, Glenn R. Zadrapa | 2002-07-16 |
| 6230822 | Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations | Eric C. Sullivan, Theodore E. Zaleski, Jr., Scott Ray Schmidt, Don Q. Nguyen, Glenn R. Zadrapa | 2001-05-15 |
| 6142249 | Earth-boring bit with improved bearing seal | Anton F. Zahradnik, Eric C. Sullivan, Terry J. Koltermann, Scott Ray Schmidt | 2000-11-07 |
| 6026917 | Earth-boring bit with improved bearing seal | Anton F. Zahradnik, Eric C. Sullivan, Terry J. Koltermann, Scott Ray Schmidt | 2000-02-22 |
| 5791421 | Optimal material pair for metal face seal in earth-boring bits | — | 1998-08-11 |