Inventor · disambiguated record
Joel Butler
Also filed as: BUTLER JOEL · BUTLER JOEL A
24 granted patents·3 pending applications·262 citations·filing 2001–2023
95Inventor score
Files withDOLBY LABORATORIES LICENSING CORP16BUTLER JOEL4EVENSTAR INC2SLS INTERNATIONAL INC2Butler Engineering LLC1
Top patents by PatentIndex Score
27 records- 0193US10778160B2Class-D dynamic closed loop feedback amplifierDOLBY LABORATORIES LICENSING CORP·Filed 2018·Granted Sep 15, 2020·11 cites·13 claims
- 0293US8582263B2Digitally controlled AC protection and attenuation circuitBUTLER JOEL·Filed 2010·Granted Nov 12, 2013·23 cites·27 claims
- 0393US7084799B1Sigma-delta modulated amplifierSLS INTERNATIONAL INC·Filed 2005·Granted Aug 1, 2006·76 cites·20 claims
- 0491US8873211B1Performance and isolation improvements for digitally controlled AC attenuation and protection circuitsBUTLER JOEL·Filed 2012·Granted Oct 28, 2014·15 cites·20 claims
- 0590US6563377B2Class D switching audio amplifierEVENSTAR INC·Filed 2001·Granted May 13, 2003·71 cites·10 claims
- 0686US7301490B2Sigma-delta modulated power supplySLS INTERNATIONAL INC·Filed 2006·Granted Nov 27, 2007·19 cites·21 claims
- 0783US6794932B1Class D switching audio amplifierEVENSTAR INC·Filed 2003·Granted Sep 21, 2004·35 cites·3 claims
- 0882US11418109B2Multi-channel cinema amplifier with power-sharing, messaging and multi-phase power supplyDOLBY LABORATORIES LICENSING CORP·Filed 2021·Granted Aug 16, 2022·1 cites·20 claims
- 0976US9213345B2Digitally controlled AC protection and attenuation circuitDOLBY LAB LICENSING CORP·Filed 2013·Granted Dec 15, 2015·3 cites·20 claims
- 1074US11882421B2Multi-channel cinema amplifier with power-sharing, messaging and multi-phase power supplyDOLBY LABORATORIES LICENSING CORP·Filed 2023·Granted Jan 23, 2024·0 cites·20 claims
- 1172US11601759B2Multi-channel cinema amplifier with power-sharing, messaging and multi-phase power supplyDOLBY LABORATORIES LICENSING CORP·Filed 2022·Granted Mar 7, 2023·0 cites·20 claims
- 1270US9014390B2Digital communication system for loudspeakersBUTLER JOEL·Filed 2010·Granted Apr 21, 2015·3 cites·30 claims
- 1368US11689860B2Multi-channel cinema amplifier with power-sharing, messaging and multi-phase power supplyDOLBY LABORATORIES LICENSING CORP·Filed 2022·Granted Jun 27, 2023·0 cites·20 claims
- 1468US11121620B2Multi-channel cinema amplifier with power-sharing, messaging and multi-phase power supplyDOLBY LABORATORIES LICENSING CORP·Filed 2017·Granted Sep 14, 2021·1 cites·20 claims
- 1566US9785160B2Digitally controlled AC protection and attenuation circuitDOLBY LABORATORIES LICENSING CORP·Filed 2015·Granted Oct 10, 2017·1 cites·20 claims
- 1661US9615169B2Digital communication system for loudspeakersDOLBY LABORATORIES LICENSING CORP·Filed 2015·Granted Apr 4, 2017·1 cites·20 claims
- 1760US10321232B2Distributed amplification for adaptive audio rendering systemsDOLBY LABORATORIES LICENSING CORP·Filed 2016·Granted Jun 11, 2019·1 cites·15 claims
- 1854US10365673B2Digitally controlled AC protection and attenuation circuitDOLBY LABORATORIES LICENSING CORP·Filed 2017·Granted Jul 30, 2019·0 cites·20 claims
- 1952US10009688B2Digital communication system for loudspeakersDOLBY LABORATORIES LICENSING CORP·Filed 2017·Granted Jun 26, 2018·0 cites·20 claims
- 2052US9178352B2Performance and isolation improvements for digitally controlled AC attenuation and protection circuitsButler Engineering LLC·Filed 2014·Granted Nov 3, 2015·1 cites·20 claims
- 2150US2023327353A1User configurable audio loudspeakerDOLBY LABORATORIES LICENSING CORP·Filed 2021·Application pending·0 cites
- 2248US8199918B2Loudspeaker protection circuitBUTLER JOEL·Filed 2008·Granted Jun 12, 2012·0 cites·17 claims
- 2341US11095264B2Configurable modal amplifier systemDOLBY LABORATORIES LICENSING CORP·Filed 2018·Granted Aug 17, 2021·0 cites·19 claims
- 2441US2023317051A1Asymmetrical acoustic hornDOLBY LABORATORIES LICENSING CORP·Filed 2021·Application pending·0 cites
- 2538US11290819B2Distributed amplification and control system for immersive audio multi-channel amplifierDOLBY LABORATORIES LICENSING CORP·Filed 2017·Granted Mar 29, 2022·0 cites·18 claims
- 2634USD1043610SSpeakerDOLBY LABORATORIES LICENSING CORP·Filed 2022·Granted Sep 24, 2024·0 cites·1 claims
- 2734US2017103033A1Decoder for a model train and method of operating a decoder for a model trainTHROTTLE UP! CORP DBA SOUNDTRAXX·Filed 2015·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →