Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5070533 | Robust electrical heating systems for mineral wells | Jack E. Bridges, Thomas J. Bajzek, Kenneth E. Hofer, Homer L. Spencer, Larry Gene Smith | 1991-12-03 |
| 4821798 | Heating system for rathole oil well | Jack E. Bridges | 1989-04-18 |
| 4793409 | Method and apparatus for forming an insulated oil well casing | Jack E. Bridges, Joseph O. Enk, Homer L. Spencer | 1988-12-27 |
| 4790375 | Mineral well heating systems | Jack E. Bridges, Guggilam C. Sresty, Homer L. Spencer | 1988-12-13 |