Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5334095 | Rotary coupler with shaft misalignment and overtravel tolerance | George J. Colling | 1994-08-02 |
| 4684060 | Furnace fan control | John T. Adams | 1987-08-04 |
| 4502625 | Furnace control apparatus having a circulator failure detection circuit for a downflow furnace | — | 1985-03-05 |
| 4407138 | Heat pump system defrost control system with override | — | 1983-10-04 |
| 4373349 | Heat pump system adaptive defrost control system | — | 1983-02-15 |
| 4352079 | High voltage ignition transformer | Timothy P. Sperry | 1982-09-28 |
| 4332141 | Defrost control system for refrigeration system | Robert T. Ruminsky, Stephen L. Serber, Rodger C. Wolfgram | 1982-06-01 |
| 4316365 | Defrost control system for refrigeration system | Robert T. Ruminsky, Stephen L. Serber, Rodger C. Wolfgram | 1982-02-23 |
| 4302947 | Heat pump system defrost control | Stephen L. Serber | 1981-12-01 |
| 4301660 | Heat pump system compressor fault detector | Stephen L. Serber | 1981-11-24 |
| 4246763 | Heat pump system compressor fault detector | Stephen L. Serber | 1981-01-27 |
| 4236379 | Heat pump compressor crankcase low differential temperature detection and control system | — | 1980-12-02 |
| 4232530 | Heat pump system compressor start fault detector | — | 1980-11-11 |
| 4220010 | Loss of refrigerant and/or high discharge temperature protection for heat pumps | Stephen L. Serber | 1980-09-02 |
| 4211089 | Heat pump wrong operational mode detector and control system | Stephen L. Serber | 1980-07-08 |
| 4209994 | Heat pump system defrost control | Stephen L. Serber | 1980-07-01 |