Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5996367 | Heat pump and air conditioning system compressor unloading method and apparatus | — | 1999-12-07 |
| 5628199 | Microprocessor-based controller | Steven R. Hoglund, Kerry E. Ober, Philip Zumsteg, James M. Tuten, III, Jay R. Goetz | 1997-05-13 |
| 5438844 | Microprocessor-based controller | Steven R. Hoglund, Kerry E. Ober, Philip Zumsteg, James M. Tuten, III, Jay R. Goetz | 1995-08-08 |
| 4590771 | Control system for defrosting the outdoor coil of a heat pump | Jacob E. Shaffer, Jr., Wayne D. Dellinger | 1986-05-27 |
| 4563877 | Control system and method for defrosting the outdoor coil of a heat pump | — | 1986-01-14 |
| 4558818 | Batch-type water heating apparatus | — | 1985-12-17 |
| 4517807 | Heat pump water heater with supplemental heat supply | — | 1985-05-21 |
| 4498622 | Quick recovery heat pump water heater | — | 1985-02-12 |
| 4314456 | Refrigerant condensing system | — | 1982-02-09 |
| 4265299 | Heat pump control system | — | 1981-05-05 |
| 4221116 | Temperature compensated control for air conditioning system or heat pump | — | 1980-09-09 |
| 4220013 | Pressure compensated control for air conditioning system or heat pump | — | 1980-09-02 |