Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7946344 | Method and assembly for producing oil and/or gas through a well traversing stacked oil and/or gas bearing earth layers | Stephen Richard Braithwaite | 2011-05-24 |
| 4836301 | Method and apparatus for directional drilling | Robert Nicholas Worrall | 1989-06-06 |
| 4682421 | Method for determining the azimuth of a borehole | Leo Maekiaho | 1987-07-28 |