Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4554941 | Fluid vibration apparatus | Eston F. Petry | 1985-11-26 |
| 4551041 | Vibration method for unplugging a slurry pipeline | Eston F. Petry | 1985-11-05 |
| 4523651 | Coal auger guidance system | Bobby J. Thomas | 1985-06-18 |
| 4430653 | Earth probing radar system | Charles J. Schafers | 1984-02-07 |
| 4391336 | Acoustic system to guide a coal seam auger | James C. Fowler, Charles E. Payton, Kenneth H. Waters | 1983-07-05 |
| 4284350 | Laser geophone | Bobby J. Thomas, William L. Chapman, James C. Fowler | 1981-08-18 |