Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4569110 | Self tapping duct fitting and method of use | — | 1986-02-11 |
| 4491124 | Self-tapping duct fitting | — | 1985-01-01 |
| 4308222 | Evaporative cooler | Franklyn F. Kelley | 1981-12-29 |