Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5452518 | Method of correcting for axial error components in magnetometer readings during wellbore survey operations | — | 1995-09-26 |
| 4894923 | Method and apparatus for measurement of azimuth of a borehole while drilling | Martin E. Cobern, Edmund M. Hamlin | 1990-01-23 |
| 4813274 | Method for measurement of azimuth of a borehole while drilling | Martin E. Cobern | 1989-03-21 |