Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7100712 | Method for hardfacing roller cone drill bit legs | John Ramsay Crowe, Angus Greig, Gary Farquhar, Kevin Angus | 2006-09-05 |
| 6955233 | Roller cone drill bit legs | John Ramsay Crowe, Angus Greig, Gary Farquhar, Kevin Angus | 2005-10-18 |
| 6874388 | Method for hardfacing roller cone drill bit legs | John Ramsay Crowe, Angus Greig, Gary Farquhar, Kevin Angus | 2005-04-05 |
| 5890851 | Apparatus for increasing hand drill pressure | — | 1999-04-06 |
| 5306459 | Insert molding method using a crush rib | Terry Dean Thomason | 1994-04-26 |
| 4589635 | Porous plug retainer | James Reichard | 1986-05-20 |