Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5351855 | Humidistat reset control | Eric W. Grald | 1994-10-04 |
| 5318104 | Error based zone controller | Dipak J. Shah, J. Ward MacArthur, Robert L. Buchholz, Eric W. Grald | 1994-06-07 |
| 5024265 | Zone control system providing synchronization of system operation with the zone of greatest demand | Robert L. Buchholz, Eric W. Grald, Dipak J. Shah | 1991-06-18 |
| 5002226 | Thermostat with mechanical heat anticipation and droop control | — | 1991-03-26 |
| 4878355 | Method and apparatus for improving cooling of a compressor element in an air conditioning system | Thomas J. Beckey | 1989-11-07 |
| 4848099 | Adaptive refrigerant control algorithm | Thomas J. Beckey | 1989-07-18 |
| 4817705 | Thermostatic control without temperature droop using duty cycle control | Michael R. Levine | 1989-04-04 |
| 4759498 | Thermostatic control without temperature droop using duty cycle control | Michael R. Levine, Thomas J. Beckey, James T. Russo | 1988-07-26 |
| 4750672 | Minimizing off cycle losses of a refrigeration system in a heating mode | Thomas J. Beckey | 1988-06-14 |
| 4582249 | Zone control system for energy conservation | — | 1986-04-15 |
| 4538420 | Defrost control system for a refrigeration heat pump apparatus | — | 1985-09-03 |
| 4533315 | Integrated control system for induced draft combustion | — | 1985-08-06 |
| 4445567 | Thermostat for control of an add-on heat pump system | — | 1984-05-01 |
| 4439139 | Furnace stack damper control apparatus | Ralph H. Torborg | 1984-03-27 |
| 4406138 | Load management control air conditioning system | — | 1983-09-27 |
| 4340355 | Furnace control using induced draft blower, exhaust gas flow rate sensing and density compensation | Ralph H. Torborg | 1982-07-20 |
| 4334855 | Furnace control using induced draft blower and exhaust gas differential pressure sensing | — | 1982-06-15 |
| 4298056 | Heat pump setback temperature control with cold weather override | — | 1981-11-03 |
| 4277018 | Clock thermostat apparatus for resetting the temperature of a space during selected time periods with means for varying the pickup time as a function of the drop in space temperature during the setback period | — | 1981-07-07 |
| 4251025 | Furnace control using induced draft blower and exhaust stack flow rate sensing | Ulrich Bonne, Ralph H. Torborg | 1981-02-17 |