Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D612524 | Light unit for a fireman's helmet | — | 2010-03-23 |
| 4587706 | Thermally responsive damper assembly having interfitting parts and method | John Prikkel, III | 1986-05-13 |
| D271615 | Damper unit | John Prikkel, III, Jeffrey R. Killin | 1983-11-29 |
| 4361272 | Thermal damper for rectangular flue | John Prikkel, III, Jeffrey R. Killin | 1982-11-30 |