Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7228696 | Hybrid heating and cooling system | Rex K. Ambs, Dennis L. Weston, James V. Holstine | 2007-06-12 |
| 5983660 | Defrost subcircuit for air-to-air heat pump | Dennis L. Weston, Rex K. Ambs | 1999-11-16 |
| 5937665 | Geothermal subcircuit for air conditioning unit | Rex K. Ambs, Dennis L. Weston | 1999-08-17 |
| 5875644 | Heat exchanger and heat pump circuit | Rex K. Ambs | 1999-03-02 |
| 5706888 | Geothermal heat exchanger and heat pump circuit | Rex K. Ambs | 1998-01-13 |