| 7479056 |
Automated drill bit re-sharpening and verification system |
Paul D Mortell, Chi Hoang, Gary Erpenbeck, Walter James Frandsen, Jr., Charles S. Slemon |
2009-01-20 |
| 7338344 |
Automated drill bit re-sharpening and verification system |
Paul D Mortell, Chi Hoang, Gary Erpenbeck, Walter James Frandsen, Jr., Charles S. Slemon |
2008-03-04 |
| 7070483 |
Automated drill bit re-sharpening and verification system |
Paul D Mortell, Chi Hoang, Gary Erpenbeck, Walter James Frandsen, Jr., Charles S. Slemon |
2006-07-04 |
| 6517411 |
Automated drill bit re-sharpening and verification system |
Paul D Mortell, Chi Hoang, Gary Erpenbeck, Walter James Frandsen, Jr., Charles S. Slemon |
2003-02-11 |
| 6283824 |
Automated drill bit re-sharpening and verification system |
Paul D Mortell, Chi Hoang, Gary Erpenbeck, Walter James Frandsen, Jr., Charles S. Slemon |
2001-09-04 |
| 6030276 |
Automated drill bit re-shapening and verification system |
Paul D Mortell, Chi Hoang, Gary Erpenbeck, Walter James Frandsen, Jr., Charles S. Slemon |
2000-02-29 |