Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9753178 | Sensor component stabilization | Neal A. Schumacher, Wade Oberpriller | 2017-09-05 |
| 7325574 | Rupture disc assembly for pneumatic plugs | — | 2008-02-05 |
| 6742263 | Filament trimmer with adjustable cutoff blade | Bart T. Ellson, Chadwick A. Shaffer | 2004-06-01 |
| 6470602 | Snowthrower having impeller assist propulsion | Donald M. White, III, John T. Gill | 2002-10-29 |
| 6415816 | Air admittance valve assembly | Richard T. Stone, Peter J. Nyvall | 2002-07-09 |
| 6324720 | Portable blower tube noise reduction | Rodney D. Lund, Steve R. Porter, Chadwick A. Shaffer, Steven J. Svoboda | 2001-12-04 |
| 6158082 | Portable blower with blower tube noise reduction | Rodney D. Lund, Steve R. Porter, Chadwick A. Shaffer, Steven J. Svoboda | 2000-12-12 |
| 6059541 | Air inlet cover for portable blower/vacuum | Steven R. Porter, Chadwick A. Shaffer, Steven J. Svoboda | 2000-05-09 |
| 5979013 | Portable blower with noise reduction | Steven R. Porter, Rodney D. Lund, Chadwick A. Shaffer, Steven J. Svoboda, Steven T. O'Brien | 1999-11-09 |
| 5105366 | Comfort control system and method factoring mean radiant temperature | — | 1992-04-14 |
| 4878355 | Method and apparatus for improving cooling of a compressor element in an air conditioning system | Lorne W. Nelson | 1989-11-07 |
| 4860552 | Heat pump fan control | — | 1989-08-29 |
| 4848099 | Adaptive refrigerant control algorithm | Lorne W. Nelson | 1989-07-18 |
| 4836442 | Compensation circuit for sensor lag to reduce undershoot and overshoot | — | 1989-06-06 |
| 4790142 | Method for minimizing cycling losses of a refrigeration system and an apparatus using the method | — | 1988-12-13 |
| 4759498 | Thermostatic control without temperature droop using duty cycle control | Michael R. Levine, Lorne W. Nelson, James T. Russo | 1988-07-26 |
| 4750672 | Minimizing off cycle losses of a refrigeration system in a heating mode | Lorne W. Nelson | 1988-06-14 |
| 4735054 | Method for minimizing off cycle losses of a refrigeration system during a cooling mode of operation and an apparatus using the method | — | 1988-04-05 |
| 4703795 | Control system to delay the operation of a refrigeration heat pump apparatus after the operation of a furnace is terminated | — | 1987-11-03 |
| 4702305 | Temperature control system for control of a multiplant environmental unit | Kerry M. Kallas | 1987-10-27 |
| 4702413 | Temperature control system using a single ramp rate curve for control of a multiplant environmental unit | Kerry M. Kallas, Daniel T. Uhrich | 1987-10-27 |
| 4674027 | Thermostat means adaptively controlling the amount of overshoot or undershoot of space temperature | — | 1987-06-16 |
| 4632177 | Clock operated thermostat having automatic changeover and optimum start | — | 1986-12-30 |
| 4615380 | Adaptive clock thermostat means for controlling over and undershoot | — | 1986-10-07 |
| 4598764 | Refrigeration heat pump and auxiliary heating apparatus control system with switchover during low outdoor temperature | — | 1986-07-08 |