Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8176999 | Steerable drill bit arrangement | Colin Walker | 2012-05-15 |
| 8051928 | Downhole assembly and cutter assembly | Robert Donald John Sedgeman, Colin Walker | 2011-11-08 |
| 7766102 | Downhole assembly and cutter assembly | Robert Donald John Sedgeman, Colin Walker | 2010-08-03 |
| 7445060 | Steerable drill bit arrangement | Michael L. Larronde | 2008-11-04 |
| 4971098 | Valve and improved seat seal therefor | — | 1990-11-20 |