Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5769314 | Variable air volume HVAC system controller and method | Kirk H. Drees | 1998-06-23 |
| 5558274 | Dual duct control system | Jerry J. Doran, Howard A. Jensen, Dick Monroe | 1996-09-24 |