Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5065019 | Method for determining petroleum saturation in a subsurface | Dewey B. Keeton, III | 1991-11-12 |
| 4950374 | Electrophoretic leak sealing system | Daren L. Laine | 1990-08-21 |
| 4947470 | System for locating leaks in a geomembrane-lined impoundment or landfill filled with material | — | 1990-08-07 |
| 4808889 | Circuit for fluorescent light power supply in a borehole television probe | — | 1989-02-28 |
| 4695840 | Remote switch position determination using duty cycle modulation | — | 1987-09-22 |
| 4652876 | Remote switch position determination using constant current signaling | — | 1987-03-24 |
| 4542344 | Detecting buried pipeline depth and location with electromagnetic triangulation | Edward H. Cooper, Jr. | 1985-09-17 |
| 4467283 | Electrical geophysical exploration system with addressable current probes | Thomas E. Owen, Wendell R. Peters, Edward Bryan | 1984-08-21 |
| 4390828 | Battery charger circuit | Merle E. Converse | 1983-06-28 |