Inventor · disambiguated record
Stephen Greetham
Also filed as: GREETHAM STEPHEN
21 granted patents·14 pending applications·237 citations·filing 2003–2023
94Inventor score
Files withDYSON TECHNOLOGY LTD22CHEN YU4CLOTHIER ANDREW CHARLTON4GREETHAM STEPHEN3FULFORD HOWARD CHARLES1
Top patents by PatentIndex Score
35 records- 0196US7750594B2Control of electrical machinesDYSON TECHNOLOGY LTD·Filed 2005·Granted Jul 6, 2010·63 cites·18 claims
- 0295US9130493B2Control of a brushless motorCHEN YU·Filed 2011·Granted Sep 8, 2015·17 cites·20 claims
- 0395US8937446B2Control of a brushless permanent-magnet motorCLOTHIER ANDREW CHARLTON·Filed 2011·Granted Jan 20, 2015·16 cites·20 claims
- 0495US8933654B2Control of a brushless motorCHEN YU·Filed 2011·Granted Jan 13, 2015·17 cites·14 claims
- 0595US8773052B2Control of a brushless motorCLOTHIER ANDREW CHARLTON·Filed 2011·Granted Jul 8, 2014·16 cites·23 claims
- 0695US8648558B2Control of a brushless motorCLOTHIER ANDREW CHARLTON·Filed 2011·Granted Feb 11, 2014·15 cites·24 claims
- 0793US7701164B2Control of electrical machinesDYSON TECHNOLOGY LTD·Filed 2005·Granted Apr 20, 2010·31 cites·16 claims
- 0892US9065367B2Control of a brushless motorGREETHAM STEPHEN·Filed 2011·Granted Jun 23, 2015·14 cites·25 claims
- 0980US8988021B2Control of a brushless motorCLOTHIER ANDREW CHARLTON·Filed 2011·Granted Mar 24, 2015·6 cites·16 claims
- 1076US9160255B2Method of preheating a brushless motorDYSON TECHNOLOGY LTD·Filed 2013·Granted Oct 13, 2015·3 cites·24 claims
- 1174US8742707B2Control of a brushless motorCHEN YU·Filed 2011·Granted Jun 3, 2014·3 cites·10 claims
- 1273US12476630B2Gate driverDYSON TECHNOLOGY LTD·Filed 2021·Granted Nov 18, 2025·0 cites·13 claims
- 1373US11682914B2Battery systemDYSON TECHNOLOGY LTD·Filed 2017·Granted Jun 20, 2023·2 cites·9 claims
- 1472US9369011B2Unidirectional electric machine comprising a permanent magnet rotor and statorGREETHAM STEPHEN·Filed 2010·Granted Jun 14, 2016·3 cites·10 claims
- 1569US8432078B2Stator with asymmetric poles and sensor oriented to more accurately determine position of rotorCHEN YU·Filed 2010·Granted Apr 30, 2013·2 cites·16 claims
- 1669US7443125B2Power conversion apparatusDYSON TECHNOLOGY LTD·Filed 2003·Granted Oct 28, 2008·28 cites·11 claims
- 1762US2025344827A1Hairstyling apparatus with reconfigurable current flowsDYSON TECHNOLOGY LTD·Filed 2023·Application pending·0 cites
- 1855US9564778B2Stator coreFULFORD HOWARD CHARLES·Filed 2010·Granted Feb 7, 2017·1 cites·17 claims
- 1954US2025202377A1Ac-to-ac converterDYSON TECHNOLOGY LTD·Filed 2023·Application pending·0 cites
- 2051US12431804B2AC-DC buck-boost converterDYSON TECHNOLOGY LTD·Filed 2021·Granted Sep 30, 2025·0 cites·11 claims
- 2150US2023221037A1Resistive liquid heaterDYSON TECHNOLOGY LTD·Filed 2021·Application pending·0 cites
- 2250US2023243552A1Resistive liquid heaterDYSON TECHNOLOGY LTD·Filed 2021·Application pending·0 cites
- 2350US2023337334A1Resistive liquid heaterDYSON TECHNOLOGY LTD·Filed 2021·Application pending·0 cites
- 2448US10756653B2Control of a brushless motorDYSON TECHNOLOGY LTD·Filed 2013·Granted Aug 25, 2020·0 cites·22 claims
- 2547US12476568B2Drive circuit for a brushless motorDYSON TECHNOLOGY LTD·Filed 2021·Granted Nov 18, 2025·0 cites·19 claims
- 2647US9859824B2Drive circuit for a brushless motor having an AC/AC boost converterDYSON TECHNOLOGY LTD·Filed 2014·Granted Jan 2, 2018·0 cites·7 claims
- 2742US2016028334A1DRIVE CIRCUIT FOR A BRUSHLESS MOTOR (as amended)DYSON TECHNOLOGY LTD·Filed 2014·Application pending·0 cites
- 2841US2018199782A1Vacuum cleaner having a dual power supplyDYSON TECHNOLOGY LTD·Filed 2016·Application pending·0 cites
- 2939US2014246942A1Stator for an electrical machineGREETHAM STEPHEN·Filed 2011·Application pending·0 cites
- 3038US2018323721A1Power supplyDYSON TECHNOLOGY LTD·Filed 2016·Application pending·0 cites
- 3137US2014319955A1Stator for an electrical machineLEAVER MARK EDWARD·Filed 2011·Application pending·0 cites
- 3237US2018219474A1Battery chargerDYSON TECHNOLOGY LTD·Filed 2016·Application pending·0 cites
- 3337US2018198366A1Battery chargerDYSON TECHNOLOGY LTD·Filed 2016·Application pending·0 cites
- 3436US2010215491A1Rotor assemblyDYSON TECHNOLOGY LTD·Filed 2010·Application pending·0 cites
- 3534US2018205313A1Battery chargerDYSON TECHNOLOGY LTD·Filed 2016·Application pending·0 cites
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →