Issued Patents All Time
Showing 26–32 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4714403 | Down-hole devices for imparting rotary motion | Colin Arlott | 1987-12-22 |
| 4694555 | Assemblies for supporting electrical circuit boards within tubes and method of using same | Donald L. Wesenberg, Peter A. Leaney | 1987-09-22 |
| 4675852 | Apparatus for signalling within a borehole while drilling | Anthony Russell | 1987-06-23 |
| 4667414 | Direction-finding devices | — | 1987-05-26 |
| 4636995 | Mud pressure control system | Anthony Russell | 1987-01-13 |
| 4535429 | Apparatus for signalling within a borehole while drilling | Anthony Russell | 1985-08-13 |
| 4507958 | Surveying of a borehole for position determination | Anthony Russell | 1985-04-02 |