Issued Patents All Time
Showing 26–38 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5069298 | Well drilling assembly | — | 1991-12-03 |
| 4766598 | Electric arc furnace and method with coaxial current flow | J. Kenneth Wittle | 1988-08-23 |
| 4525764 | System for disconnecting an electrical power source from a load | — | 1985-06-25 |
| 4516608 | Tubular member | John K. Wittle | 1985-05-14 |
| 4495990 | Apparatus for passing electrical current through an underground formation | John K. Wittle, Christy W. Bell | 1985-01-29 |
| 4473114 | In situ method for yielding a gas from a subsurface formation of hydrocarbon material | Christy W. Bell, John K. Wittle | 1984-09-25 |
| 4461010 | Power supply circuit for a direct current arc furnace | — | 1984-07-17 |
| 4459629 | Electric circuit breaker utilizing semiconductor diodes for facilitating interruption | — | 1984-07-10 |
| 4431612 | Apparatus for the decomposition of hazardous materials and the like | Christy W. Bell, John K. Wittle | 1984-02-14 |
| 4424547 | Surge suppressor construction | John E. Zlupko | 1984-01-03 |
| 4382341 | Method for drying drilling mud | Christy W. Bell, Robert Y. Pogontchef | 1983-05-10 |
| 4382469 | Method of in situ gasification | Christy W. Bell, John K. Wittle | 1983-05-10 |
| 4367132 | Method for removing liquid from chemically-precipitated sludge | Christy W. Bell, John K. Wittle | 1983-01-04 |