Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6955233 | Roller cone drill bit legs | John Ramsay Crowe, Angus Greig, Robert Hamilton, Kevin Angus | 2005-10-18 |
| 6874388 | Method for hardfacing roller cone drill bit legs | John Ramsay Crowe, Angus Greig, Robert Hamilton, Kevin Angus | 2005-04-05 |