Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5252081 | Plug for use with self regulating cable | — | 1993-10-12 | |
| 4852611 | Wellhead connection of hydraulic control lines | Edwin R. Knerr, William S. Cowan | 1989-08-01 | |
| D293711 | Utility heater | — | 1988-01-12 | |
| 4426960 | Control circuitry for multistage fans | — | 1984-01-24 | $5,969,000 |
| 4329725 | Control circuitry for multistage fans | — | 1982-05-11 | $4,935,000 |