Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5433377 | Interlock and forced air furnace and HRV | Steven O. Heard, Robert W. Peitz | 1995-07-18 |
| 5144812 | Outdoor fan control for variable speed heat pump | Eugene L. Mills, Jr., John M. Palmer, Peter G. Pierret | 1992-09-08 |