| 7479056 |
Automated drill bit re-sharpening and verification system |
Paul D Mortell, Chi Hoang, David M. McElrone, Walter James Frandsen, Jr., Charles S. Slemon |
2009-01-20 |
| 7338344 |
Automated drill bit re-sharpening and verification system |
Paul D Mortell, Chi Hoang, David M. McElrone, Walter James Frandsen, Jr., Charles S. Slemon |
2008-03-04 |
| 7070483 |
Automated drill bit re-sharpening and verification system |
Paul D Mortell, Chi Hoang, David M. McElrone, Walter James Frandsen, Jr., Charles S. Slemon |
2006-07-04 |
| 6517411 |
Automated drill bit re-sharpening and verification system |
Paul D Mortell, Chi Hoang, David M. McElrone, Walter James Frandsen, Jr., Charles S. Slemon |
2003-02-11 |
| 6283824 |
Automated drill bit re-sharpening and verification system |
Paul D Mortell, Chi Hoang, David M. McElrone, Walter James Frandsen, Jr., Charles S. Slemon |
2001-09-04 |
| 6030157 |
Composite drill bit using adhesive bond |
— |
2000-02-29 |
| 6030276 |
Automated drill bit re-shapening and verification system |
Paul D Mortell, Chi Hoang, David M. McElrone, Walter James Frandsen, Jr., Charles S. Slemon |
2000-02-29 |
| 5927912 |
Composite drill bit using adhesive bond |
Benjamin Mihai |
1999-07-27 |
| 5056610 |
Shale diverting means for a sealed bearing drill bit |
Michael S. Oliver, Chris E. Cawthorne |
1991-10-15 |