Hughes; Dennis R.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Hughes; Dennis R..The latest application filed is for "water heater having condensing recuperator and dual purpose pump".
- Hughes; Dennis R. - Hartford WI US
- Hughes, Dennis R. - Edinburg TX
- Hughes; Dennis R. - Germantown WI
| Patent | Date |
|---|---|
| Heating device having a secondary safety circuit for a fuel line and method of operating the same Grant 9,228,746 - Hughes , et al. January 5, 2 | 2016-01-05 |
| Water Heater Having Condensing Recuperator And Dual Purpose Pump App 20130319348 - Hughes; Dennis R. ; et al. | 2013-12-05 |
| Anti-stacking pump assembly for a water heater and method of operating the same Grant 8,596,225 - Hughes December 3, 2 | 2013-12-03 |
| Removable heat exchanger for a gas fired water heater Grant 8,047,164 - Hughes November 1, 2 | 2011-11-01 |
| Pulse Combustion System For A Water Heater App 20100192874 - Hughes; Dennis R. ; et al. | 2010-08-05 |
| Anti-stacking Pump Assembly For A Water Heater And Method Of Operating The Same App 20100122669 - Hughes; Dennis R. | 2010-05-20 |
| Removable Heat Exchanger For A Gas Fired Water Heater App 20090308333 - Hughes; Dennis R. | 2009-12-17 |
| Heating device having a thermal cut-off circuit for a fuel line and method of operating the same Grant 7,438,023 - Lee , et al. October 21, 2 | 2008-10-21 |
| Blower and method of conveying fluids Grant 7,354,244 - Hasbargen , et al. April 8, 2 | 2008-04-08 |
| Heating Device Having A Thermal Cut-off Circuit For A Fuel Line And Method Of Operating The Same App 20070284000 - Lee; Hyungsik ; et al. | 2007-12-13 |
| Heating Device Having A Secondary Safety Circuit For A Fuel Line And Method Of Operating The Same App 20070281257 - Hughes; Dennis R. ; et al. | 2007-12-06 |
| Rooftop water heater Grant 7,277,627 - Hughes , et al. October 2, 2 | 2007-10-02 |
| Blower and method of conveying fluids App 20060065211 - Hasbargen; Michael Robert ; et al. | 2006-03-30 |
| Airflow apparatus Grant 6,948,454 - Hughes , et al. September 27, 2 | 2005-09-27 |
| Books having removable panels for forming structures App 20050023818 - Hughes, Dennis R. | 2005-02-03 |
| Airflow apparatus App 20040206311 - Hughes, Dennis R. ; et al. | 2004-10-21 |
| Water heater having flue damper with airflow apparatus Grant 6,745,724 - Hughes , et al. June 8, 2 | 2004-06-08 |
| Rooftop water heater Grant 6,679,014 - Hughes , et al. January 20, 2 | 2004-01-20 |
| Water heater having flue damper with airflow apparatus App 20030196610 - Hughes, Dennis R. ; et al. | 2003-10-23 |
| Rooftop water heater App 20030123863 - Hughes, Dennis R. ; et al. | 2003-07-03 |
| Rooftop water heater App 20030041554 - Hughes, Dennis R. ; et al. | 2003-03-06 |
| Water heater having flue damper with airflow apparatus App 20030024487 - Hughes, Dennis R. | 2003-02-06 |
| Rooftop water heater App 20020069868 - Hughes, Dennis R. ; et al. | 2002-06-13 |
| Water heater flue system App 20010035135 - Hughes, Dennis R. ; et al. | 2001-11-01 |
| Combustion burner for a water heater Grant 6,036,480 - Hughes , et al. March 14, 2 | 2000-03-14 |
| Water heater with integral mixing valve Grant 5,347,956 - Hughes September 20, 1 | 1994-09-20 |
| Water heater construction Grant 4,911,108 - Akkala , et al. * March 27, 1 | 1990-03-27 |
| Turbulator construction for a heat exchanger Grant 4,823,865 - Hughes April 25, 1 | 1989-04-25 |
| Water heater construction Grant 4,817,564 - Akkala , et al. April 4, 1 | 1989-04-04 |
| Heat exchanger having a turbulator construction Grant 4,577,681 - Hughes March 25, 1 | 1986-03-25 |
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