Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6994743 | Two stage air filter | Kyle Andrew Brownell, Scott W. Mathews, Alan Lorenz Breitenfeldt | 2006-02-07 |
| 6251153 | Centrifugal air filter | Alan Lorenz Breitenfeldt, Jared Clyde Wesenick | 2001-06-26 |
| 6050258 | Exhaust fan with dry lubricant coating | Arnold S. Heil, David Dahl, Joseph A. Knoedler | 2000-04-18 |
| 5809993 | Exhaust fan with dry lubricant coating | Arnold S. Heil, David Dahl, Joseph A. Knoedler | 1998-09-22 |
| 5673681 | Ventilation system for conveyor oven | Chris B. Check, Jay J. Bauman | 1997-10-07 |
| 4373509 | High efficiency ventilation system | Jerome A. Schumacher | 1983-02-15 |