Issued Patents 2023
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11828111 | Apparatus and method relating to managed pressure drilling | David Symonds, Richard P. Johnston, Gordon Wallace | 2023-11-28 |
| 11708727 | Connection system for a marine drilling riser | Richard P. Johnston, David Symonds, Gordon Wallace | 2023-07-25 |