Inventor · disambiguated record
Lewis Illingworth
Also filed as: ILLINGWORTH LEWIS
31 granted patents·9 pending applications·1,275 citations·filing 1985–2003
98Inventor score
Files withVORTEX HOLDING COMPANY13AVIONIC INSTR INC9VORTEX HC LLC4AVIONICS INSTR INC1FISKARS ELECTRONICS CORP1
Top patents by PatentIndex Score
40 records- 0197US6616094B2Lifting platformVORTEX HOLDING COMPANY·Filed 2000·Granted Sep 9, 2003·99 cites·40 claims
- 0297US6388393B1Ballasts for operating light emitting diodes in AC circuitsAVIONIC INSTR INC·Filed 2000·Granted May 14, 2002·226 cites·11 claims
- 0394US6719830B2Toroidal vortex vacuum cleaner centrifugal dust separatorVORTEX HOLDING COMPANY·Filed 2001·Granted Apr 13, 2004·87 cites·43 claims
- 0492US6802881B2Rotating wave dust separatorVORTEX HC LLC·Filed 2003·Granted Oct 12, 2004·52 cites·50 claims
- 0591US6802693B2Vortex attractor with vanes attached to containing ring and backplateVORTEX HOLDING COMPANY·Filed 2002·Granted Oct 12, 2004·48 cites·44 claims
- 0691US6689225B2Toroidal vortex vacuum cleaner with alternative collection apparatusVORTEX HOLDING COMPANY·Filed 2001·Granted Feb 10, 2004·63 cites·24 claims
- 0791US6464459B2Lifting platform with energy recoveryAVIONIC INSTR INC·Filed 2001·Granted Oct 15, 2002·64 cites·17 claims
- 0888US6543726B2Fluid flow straightening techniquesVORTEX HOLDING COMPANY·Filed 2001·Granted Apr 8, 2003·52 cites·27 claims
- 0988US5424933AResonant forward converter circuit with control circuit for controlling switching transistor on and off timesAVIONIC INSTR INC·Filed 1994·Granted Jun 13, 1995·67 cites·8 claims
- 1085US6520449B2Lifting platform with positive horizontal stabilityVORTEX HOLDING COMPANY·Filed 2001·Granted Feb 18, 2003·44 cites·19 claims
- 1185US6256213B1Means for transformer rectifier unit regulationAVIONIC INSTR INC·Filed 1999·Granted Jul 3, 2001·79 cites·10 claims
- 1282US6811687B2Vortex pool cleanerVORTEX HOLDING COMPANY·Filed 2002·Granted Nov 2, 2004·24 cites·33 claims
- 1381US6595753B1Vortex attractorVORTEX HOLDING COMPANY A·Filed 1999·Granted Jul 22, 2003·45 cites·66 claims
- 1481US6565321B1Vortex attractorVORTEX HOLDING COMPANY·Filed 1999·Granted May 20, 2003·45 cites·90 claims
- 1575US6687951B2Toroidal vortex bagless vacuum cleanerVORTEX HOLDING COMPANY·Filed 2001·Granted Feb 10, 2004·19 cites·13 claims
- 1675US6282111B1Inverter control using current mode slope modulationAVIONIC INSTR INC·Filed 1999·Granted Aug 28, 2001·48 cites·14 claims
- 1772US6957472B2Cannister and upright vortex vacuum cleanersVORTEX HC LLC·Filed 2002·Granted Oct 25, 2005·20 cites·48 claims
- 1872US6619922B2Vortex attractor for planar and non-planar surfacesVORTEX HOLDING COMPANY·Filed 2001·Granted Sep 16, 2003·20 cites·32 claims
- 1971US6729839B1Toroidal and compound vortex attractorVORTEX HOLDING COMPANY·Filed 2001·Granted May 4, 2004·20 cites·42 claims
- 2071US6612402B1Elastic motor with constant torque outputAVIONIC INSTR INC·Filed 2000·Granted Sep 2, 2003·13 cites·8 claims
- 2170US6623352B2Vortex air barrierVORTEX HOLDING COMPANY·Filed 2001·Granted Sep 23, 2003·22 cites·35 claims
- 2267US6960063B2Vortex attractor without a backplateVORTEXHC LLC·Filed 2002·Granted Nov 1, 2005·15 cites·31 claims
- 2366US6881025B2Suction cup vortex attractorVORTEX HC LLC·Filed 2002·Granted Apr 19, 2005·16 cites·21 claims
- 2460US6144193AIsolated transformer coupled gate drive for signals having variable duty cycleAVIONIC INSTR INC·Filed 1996·Granted Nov 7, 2000·16 cites·14 claims
- 2559US6497553B2Vortex attractorVORTEX HOLDING COMPANY·Filed 2001·Granted Dec 24, 2002·14 cites·88 claims
- 2658US5831838AResonant fly-forward converter circuitAVIONICS INSTR INC·Filed 1997·Granted Nov 3, 1998·30 cites·1 claims
- 2754US6742626B2Elastic motor having time-averaged constant torque outputAVIONIC INSTR INC·Filed 2002·Granted Jun 1, 2004·1 cites·17 claims
- 2849US7143468B2Vortex vacuum cleaner nozzle with means to prevent plume formationILLINGWORTH LEWIS·Filed 2003·Granted Dec 5, 2006·4 cites·18 claims
- 2949US4636927ADC to AC converterFISKARS ELECTRONICS CORP·Filed 1985·Granted Jan 13, 1987·19 cites·14 claims
- 3048US2004139709A1Dynamic transfer chamber separatorFiled 2003·Application pending·0 cites
- 3147US2003167741A1Combined toroidal and cylindrical vortex dust separatorFiled 2003·Application pending·0 cites
- 3246US6896104B2Flat spool elastic motor having time-averaged constant torque outputVORTEX HC LLC·Filed 2001·Granted May 24, 2005·0 cites·19 claims
- 3344US2001045325A1Elastic motorFiled 2001·Application pending·0 cites
- 3443US2004139710A1Passive transfer chamber separatorFiled 2003·Application pending·0 cites
- 3542US2002148069A1Toroidal vortex nozzleFiled 2002·Application pending·0 cites
- 3642US2003136094A1Axial flow centrifugal dust separatorFiled 2002·Application pending·0 cites
- 3739US2004018089A1Vortex attractorFiled 2003·Application pending·0 cites
- 3838US2004032315A1Variable inductor responsive to AC current levelFiled 2002·Application pending·0 cites
- 3937US2003150198A1Filterless folded and ripple dust separators and vacuum cleaners using the sameFiled 2003·Application pending·0 cites
- 4031US5444357AMethod and apparatus for three-phase voltage doublingAVIONIC INSTR INC·Filed 1993·Granted Aug 22, 1995·3 cites·18 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →