Issued Patents All Time
Showing 76–100 of 108 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6112836 | Rotary drill bits employing tandem gage pad arrangement | John R. Spaar, James A. Norris, Christopher C. Beuershausen, Michael P. Ohanian, Roland Illerhaus +2 more | 2000-09-05 |
| 6098730 | Earth-boring bit with super-hard cutting elements | Danny E. Scott, Robert J. Farr, Stephen R. Jurewicz, Kenneth M. Jensen, Paul Douglas Jones | 2000-08-08 |
| 6050354 | Rolling cutter bit with shear cutting gage | Danny E. Scott, Robert E. Grimes | 2000-04-18 |
| 6006845 | Rotary drill bits for directional drilling employing tandem gage pad arrangement with reaming capability | Roland Illerhaus, Christopher C. Beuershausen, Mark W. Dykstra, James A. Norris, Michael P. Ohanian +1 more | 1999-12-28 |
| 5996713 | Rolling cutter bit with improved rotational stabilization | John Vanderstaay Kenner, Matthew R. Isbell, Mohammad Swadi, Danny E. Scott | 1999-12-07 |
| 5967247 | Steerable rotary drag bit with longitudinally variable gage aggressiveness | — | 1999-10-19 |
| 5890552 | Superabrasive-tipped inserts for earth-boring drill bits | Danny E. Scott | 1999-04-06 |
| 5819861 | Earth-boring bit with improved cutting structure | Danny E. Scott | 1998-10-13 |
| 5765653 | Reaming apparatus and method with enhanced stability and transition from pilot hole to enlarged bore diameter | Michael L. Doster, David M. Schnell, Bart T. McDonald | 1998-06-16 |
| 5758733 | Earth-boring bit with super-hard cutting elements | Danny E. Scott, Robert J. Farr, Stephen R. Jurewicz, Kenneth M. Jensen, Paul Douglas Jones | 1998-06-02 |
| 5752573 | Earth-boring bit having shear-cutting elements | Danny E. Scott | 1998-05-19 |
| 5746280 | Earth-boring bit having shear-cutting inner row elements | Danny E. Scott, Turlach Paul Boylan | 1998-05-05 |
| 5697462 | Earth-boring bit having improved cutting structure | Robert E. Grimes, Christopher J. Rohmer | 1997-12-16 |
| 5695018 | Earth-boring bit with negative offset and inverted gage cutting elements | Matthew R. Isbell | 1997-12-09 |
| 5655612 | Earth-boring bit with shear cutting gage | Robert E. Grimes, Danny E. Scott | 1997-08-12 |
| 5592995 | Earth-boring bit having shear-cutting heel elements | Danny E. Scott, Matthew R. Isbell, Nigel Charles Meany, Alain Besson | 1997-01-14 |
| 5586612 | Roller cone bit with positive and negative offset and smooth running configuration | Matthew R. Isbell | 1996-12-24 |
| 5562171 | Anti-balling drill bit | Alain Besson | 1996-10-08 |
| 5542485 | Earth-boring bit with improved cutting structure | Danny E. Scott, Robert E. Grimes, Matthew R. Isbell | 1996-08-06 |
| 5479997 | Earth-boring bit with improved cutting structure | Danny E. Scott, Robert E. Grimes, Matthew R. Isbell | 1996-01-02 |
| 5467836 | Fixed cutter bit with shear cutting gage | Robert E. Grimes, Danny E. Scott | 1995-11-21 |
| 5445231 | Earth-burning bit having an improved hard-faced tooth structure | Danny E. Scott, Mou-Chih Lu | 1995-08-29 |
| 5407022 | Free cutting gage insert with relief angle | Danny E. Scott | 1995-04-18 |
| 5351769 | Earth-boring bit having an improved hard-faced tooth structure | Danny E. Scott, Anton F. Zahradnik | 1994-10-04 |
| 5351768 | Earth-boring bit with improved cutting structure | Danny E. Scott, Robert E. Grimes, Matthew R. Isbell | 1994-10-04 |