Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7479056 | Automated drill bit re-sharpening and verification system | Chi Hoang, David M. McElrone, Gary Erpenbeck, Walter James Frandsen, Jr., Charles S. Slemon | 2009-01-20 |
| 7338344 | Automated drill bit re-sharpening and verification system | Chi Hoang, David M. McElrone, Gary Erpenbeck, Walter James Frandsen, Jr., Charles S. Slemon | 2008-03-04 |
| 7070483 | Automated drill bit re-sharpening and verification system | Chi Hoang, David M. McElrone, Gary Erpenbeck, Walter James Frandsen, Jr., Charles S. Slemon | 2006-07-04 |
| 6517411 | Automated drill bit re-sharpening and verification system | Chi Hoang, David M. McElrone, Gary Erpenbeck, Walter James Frandsen, Jr., Charles S. Slemon | 2003-02-11 |
| 6283824 | Automated drill bit re-sharpening and verification system | Chi Hoang, David M. McElrone, Gary Erpenbeck, Walter James Frandsen, Jr., Charles S. Slemon | 2001-09-04 |
| 6030276 | Automated drill bit re-shapening and verification system | Chi Hoang, David M. McElrone, Gary Erpenbeck, Walter James Frandsen, Jr., Charles S. Slemon | 2000-02-29 |
| 5655354 | Method and apparatus for automated verification and loading of precision drill bits into a drilling machine package | James C. Baker, Robert C. Henningsgard, Benjamin Mihai, Tim L. Taylor | 1997-08-12 |