Inventor · disambiguated record
Douglas J. Williams
Also filed as: WILLIAMS DOUGLAS · WILLIAMS DOUGLAS J · WILLIAMS DOUGLAS JOHN · WILLIAMS DOUGLAS P
11 granted patents·3 pending applications·580 citations·filing 1975–2016
91Inventor score
Top patents by PatentIndex Score
14 records- 0197US6081205AElectronic parking meter and electric automobile recharging stationFiled 1994·Granted Jun 27, 2000·443 cites·17 claims
- 0283US9401676B2Solar photovoltaic-thermal collector assembly and method of useWILLIAMS DOUGLAS·Filed 2016·Granted Jul 26, 2016·2 cites·17 claims
- 0375US9263986B2Solar hybrid photovoltaic-thermal collector assemblyWILLIAMS DOUGLAS·Filed 2014·Granted Feb 16, 2016·1 cites·11 claims
- 0473US5616186AThermophotovoltaic electric generator using low bandgap photovoltaic cells with a hydrocarbon burner and enhanced catalytic infrared emitterJX CRYSTALS INC·Filed 1995·Granted Apr 1, 1997·45 cites·27 claims
- 0566US4244354ASolar panelWILLIAMS DOUGLAS J·Filed 1979·Granted Jan 13, 1981·21 cites·26 claims
- 0665US4016080AFluid filter and purifying apparatusWILLIAMS DOUGLAS J·Filed 1975·Granted Apr 5, 1977·21 cites·8 claims
- 0763US4215646ALow pressure differential detecting whistleWILLIAMS DOUGLAS J·Filed 1978·Granted Aug 5, 1980·18 cites·16 claims
- 0856US2012221406A1System and method for delivering preference-based content and advertisingKRUHOEFFER DOUGLAS PAUL·Filed 2009·Application pending·0 cites
- 0947US6337437B1Electric power generating lantern using forced air cooled low bandgap photovoltaic cellsJX CRYSTALS INC·Filed 1996·Granted Jan 8, 2002·15 cites·49 claims
- 1047US2010146042A1Interactive customizable broadcastKRUHOEFFER DOUGLAS PAUL·Filed 2008·Application pending·0 cites
- 1145US4252076AAutomatic signaling deviceWILLIAMS DOUGLAS J·Filed 1978·Granted Feb 24, 1981·8 cites·1 claims
- 1236US4395589AElectro-acoustical structureEECO INC·Filed 1981·Granted Jul 26, 1983·3 cites·9 claims
- 1331US5588403ARack and pinion valve operating systemFiled 1995·Granted Dec 31, 1996·3 cites·2 claims
- 1430US2002088242A1Refrigeration cooled transformerFiled 2001·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Douglas J. Williams files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →