Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6736208 | Wellhead production pumping tree with access port | Kwong-Onn Chan | 2004-05-18 |
| 6637509 | Wellhead stuffing box support assembly | Keith David Farquharson | 2003-10-28 |
| 6457530 | Wellhead production pumping tree | Tony Lam, Keith David Farquharson | 2002-10-01 |