Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4210867 | Induction coil method for detecting underground flame fronts | John D. McCollum | 1980-07-01 |
| 4210868 | Method for detecting an underground flame front using resistance probes | John D. McCollum | 1980-07-01 |
| 4184548 | Method for determining the position and inclination of a flame front during in situ combustion of an oil shale retort | Christos Papadopoulos | 1980-01-22 |