Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4411307 | Wound tube heat exchanger | — | 1983-10-25 |
| 4380156 | Multiple source heat pump | — | 1983-04-19 |
| 4336692 | Dual source heat pump | Joseph A. Pietsch | 1982-06-29 |
| 4308723 | Heat pump employing optimal refrigerant compressor for low pressure ratio applications | — | 1982-01-05 |
| 4307578 | Heat exchanger efficiently operable alternatively as evaporator or condenser | — | 1981-12-29 |
| 4308042 | Heat pump with freeze-up prevention | — | 1981-12-29 |
| 4217765 | Heat exchanger-accumulator | — | 1980-08-19 |