Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7100712 | Method for hardfacing roller cone drill bit legs | John Ramsay Crowe, Angus Greig, Robert Hamilton, Gary Farquhar | 2006-09-05 |
| 6955233 | Roller cone drill bit legs | John Ramsay Crowe, Angus Greig, Robert Hamilton, Gary Farquhar | 2005-10-18 |
| 6874388 | Method for hardfacing roller cone drill bit legs | John Ramsay Crowe, Angus Greig, Robert Hamilton, Gary Farquhar | 2005-04-05 |