Issued Patents All Time
Showing 26–38 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7387177 | Bearing insert sleeve for roller cone bit | Anton F. Zahradnik, Terry J. Koltermann, Aaron J. Dick, Eric C. Sullivan, Scott Shiqiang Shu | 2008-06-17 |
| 7350600 | Shirttails for reducing damaging effects of cuttings | Christopher C. Beuershausen, Raul E. Lema, Ronald Hales, Gregory L. Ricks, Chih Lin +6 more | 2008-04-01 |
| 7182162 | Shirttails for reducing damaging effects of cuttings | Christopher C. Beuershausen, Raul E. Lema, Ronald Hales, Gregory L. Ricks, Chih Lin +6 more | 2007-02-27 |
| 7086487 | Anti-mud packing seal gland | — | 2006-08-08 |
| 7066280 | 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, Glenn R. Zadrapa, Timothy K. Marvel +1 more | 2006-06-27 |
| 7066286 | Gage surface scraper | Terry J. Koltermann, Gregory L. Ricks, Mark E. Morris, Chris M. McCarty, Chih Lin | 2006-06-27 |
| 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, Glenn R. Zadrapa, Chih Lin | 2003-09-30 |
| 6571886 | 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, Glenn R. Zadrapa, Timothy K. Marvel +1 more | 2003-06-03 |
| 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, Glenn R. Zadrapa, Chih Lin | 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, Glenn R. Zadrapa, Chih Lin | 2003-04-01 |
| 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, Glenn R. Zadrapa, Chih Lin | 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, Glenn R. Zadrapa, Chih Lin | 2001-05-15 |
| 6209668 | Earth-boring bit with improved cutting structure | Rudolf Carl Pessier, Scott Ray Schmidt | 2001-04-03 |