Issued Patents All Time
Showing 25 most recent of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11953216 | Ventilation controller | Roy Randall Crawford | 2024-04-09 |
| 11199334 | Ventilation controller | Roy Randall Crawford | 2021-12-14 |
| 9601919 | Time delay with control voltage sensing | — | 2017-03-21 |
| 9228757 | Heater interlock control for air conditioning system | — | 2016-01-05 |
| 9115907 | Ventilation controller | Roy Randall Crawford | 2015-08-25 |
| 8961282 | Ventilation controller | Roy Randall Crawford | 2015-02-24 |
| 8746584 | Heater interlock control for air conditioning system | — | 2014-06-10 |
| 8702482 | Ventilation controller | Roy Randall Crawford | 2014-04-22 |
| 8695887 | Temperature compensation method for thermostats | Amanda Filbeck | 2014-04-15 |
| 8117862 | Device and method for recording air conditioning system information | Jie Song, Gordon Jeffrey Hugghins, John T. Taylor, W. Randall Erwin, Stephen Kowalski +4 more | 2012-02-21 |
| 7975494 | Control system interface with display for air conditioning apparatus | Roger L. Boydstun, Gordon Jeffrey Hugghins, Carl L. Garrett, Daniel John Blair, Robert G. Royoroft +1 more | 2011-07-12 |
| 7837128 | Multiple thermostats for air conditioning system with time setting feature | Gordon Jeffrey Hugghins, Carl L. Garrett | 2010-11-23 |
| 7640761 | System and method for controlling indoor air flow for heating, ventilating and air conditioning equipment | Carl L. Garrett, Timothy Wayne Storm, Gordon Jeffrey Hugghins | 2010-01-05 |
| 7600694 | Multiple thermostats for air conditioning system with time setting feature | Gordon Jeffrey Hugghins, Carl L. Garrett | 2009-10-13 |
| 7434741 | Automatic damper control for air conditioning system humidifier | Karl J. Mutchnik | 2008-10-14 |
| 7380588 | Heat pump control system and method of operating to provide automatic backup heating modes | — | 2008-06-03 |
| 7351274 | Air filtration system control | Stephen J. Vendt, Roger L. Boydstun, J. Mark Hagan | 2008-04-01 |
| 7228693 | Controlling airflow in an air conditioning system for control of system discharge temperature and humidity | — | 2007-06-12 |
| D533091 | Heating, ventilating and air conditioning controller | Carl L. Garrett, Nathan P. Parker, Timothy Wayne Storm, Dale C. Cotton, Amy N. Sorensen +1 more | 2006-12-05 |
| 6647203 | Air handler power distribution system | Stephen A. Guy | 2003-11-11 |
| 6377426 | Gas furnace with variable speed draft inducer | G. Jeffrey Hugghins, Leonard W. Holmes, James T. Vershaw, Timothy Wayne Storm | 2002-04-23 |
| 6282910 | Indoor blower variable speed drive for reduced airflow | — | 2001-09-04 |
| 6257870 | Gas furnace with variable speed draft inducer | G. Jeffrey Hugghins, Leonard W. Holmes, James T. Vershaw, Timothy Wayne Storm | 2001-07-10 |
| 6247921 | Apparatus for generating a spark | — | 2001-06-19 |
| 6066194 | Electronic room air cleaner with variable speed motor | Gordon Jeffrey Hugghins | 2000-05-23 |