Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6568492 | Drag-type casing mill/drill bit | Gary M. Thigpen | 2003-05-27 |
| 6564886 | Drill bit with rows of cutters mounted to present a serrated cutting edge | Graham Mensa-Wilmot, Stephen G. Southland | 2003-05-20 |