Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D699270 | Combined grille guard bracket and assembly | Lyle Beidler, William R. Frederick, Daniel Karlak | 2014-02-11 |
| 7377848 | Filter purge control for HVAC variable air circulation system | Hugh Richard Voit, II, Robert D. Doescher, Alan G. Leupold | 2008-05-27 |
| 7338357 | Filter purge control for HVAC fixed air circulation system | Hugh Richard Voit, II, Robert D. Doescher, Alan G. Leupold | 2008-03-04 |