Inventor · disambiguated record
William T. Harrigill
Also filed as: HARRIGILL JR WILLIAM T · HARRIGILL WILLIAM T
13 granted patents·1 pending application·307 citations·filing 1977–2010
93Inventor score
Top patents by PatentIndex Score
14 records- 0196US7298968B1Pumpless combination instantaneous/storage water heater systemRHEEM MFG CO·Filed 2007·Granted Nov 20, 2007·69 cites·25 claims
- 0288US7242310B2Control techniques for shut-off sensors in fuel-fired heating appliancesRHEEM MFG CO·Filed 2005·Granted Jul 10, 2007·24 cites·26 claims
- 0387US7818095B2Water heater monitor/diagnostic display apparatusRHEEM MFG CO·Filed 2008·Granted Oct 19, 2010·15 cites·25 claims
- 0486US4974579AInduced draft, fuel-fired furnace apparatus having an improved, high efficiency heat exchangerRHEEM MFG CO·Filed 1989·Granted Dec 4, 1990·41 cites·9 claims
- 0583US6412447B1Fuel-fired water heater with flammable vapor sensor and associated induced flow tubeWATER HEATER IND JOINT RES & DEVELOPMENT CONSORTIUM·Filed 2001·Granted Jul 2, 2002·36 cites·27 claims
- 0680US4730600ACondensing furnaceCOLEMAN CO·Filed 1981·Granted Mar 15, 1988·32 cites·16 claims
- 0766US4092712ARegulated high efficiency, lightweight capacitor-diode multiplier dc to dc converterNASA·Filed 1977·Granted May 30, 1978·25 cites·13 claims
- 0859US7849821B2Burner flashback detection and system shutdown apparatusRHEEM MFG CO·Filed 2007·Granted Dec 14, 2010·2 cites·10 claims
- 0958US6035812ACombustion air shutoff system for a fuel-fired heating applianceWATER HEATER IND JOINT RES & DEVELOPMENT CONSORTIUM·Filed 1998·Granted Mar 14, 2000·22 cites·15 claims
- 1057US6418882B1Power vented, fuel fired water heater with soft ignition systemWATER HEATER IND JOINT RES & DEVELOPMENT CONSORTIUM·Filed 2001·Granted Jul 16, 2002·11 cites·22 claims
- 1155US4867673ACondensing furnaceCOLEMAN CO·Filed 1988·Granted Sep 19, 1989·12 cites·1 claims
- 1249US4779676ACondensing furnaceCOLEMAN CO·Filed 1986·Granted Oct 25, 1988·10 cites·4 claims
- 1348US2010192873A1Burner Flashback Detection and System Shutdown ApparatusRHEEM MFG CO·Filed 2010·Application pending·0 cites
- 1442US4926840APilot gas bypass system for fuel-fired furnacesRHEEM MFG CO·Filed 1989·Granted May 22, 1990·8 cites·12 claims
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