Assignee
MAGNETEK INC
US·92 granted patents·1 pending application·2,649 citations·filing 1979–2025
Top patents by PatentIndex Score
93 records- 0196US5568041ALow-cost power factor correction circuit and method for electronic ballastsMAGNETEK INC·Filed 1995·Granted Oct 22, 1996·134 cites·9 claims
- 0295US5583402ASymmetry control circuit and methodMAGNETEK INC·Filed 1994·Granted Dec 10, 1996·180 cites·9 claims
- 0393US8374011B2Method and apparatus for boosting DC bus voltageMAGNETEK INC·Filed 2010·Granted Feb 12, 2013·17 cites·20 claims
- 0492US6598859B1Multiple hoist synchronization apparatus and methodMAGNETEK INC·Filed 2001·Granted Jul 29, 2003·84 cites·17 claims
- 0591US5932995ADual buck converter with coupled inductorsMAGNETEK INC·Filed 1998·Granted Aug 3, 1999·104 cites·18 claims
- 0688US5788527AElectrical connector with improved safety latching for a fluorescent-lighting ballastMAGNETEK INC·Filed 1997·Granted Aug 4, 1998·67 cites·12 claims
- 0787US5731666AIntegrated-magnetic filter having a lossy shuntMAGNETEK INC·Filed 1996·Granted Mar 24, 1998·115 cites·6 claims
- 0885US5914547AAuxiliary bearing assembly for reduction of unwanted shaft voltages in an electric motorMAGNETEK INC·Filed 1997·Granted Jun 22, 1999·68 cites·18 claims
- 0984US6204602B1Compact fluorescent lamp and ballast assembly with an air gap for thermal isolationMAGNETEK INC·Filed 1999·Granted Mar 20, 2001·45 cites·14 claims
- 1083US4754407ADigital phase synchronizerMAGNETEK INC·Filed 1986·Granted Jun 28, 1988·43 cites·15 claims
- 1182US9950908B2System and method for determining a load in a material handling systemMAGNETEK INC·Filed 2016·Granted Apr 24, 2018·4 cites·18 claims
- 1282US5488268AElectrical connector with improved centering of mating terminal pins, for a fluorescent-lighting ballastMAGNETEK INC·Filed 1994·Granted Jan 30, 1996·55 cites·29 claims
- 1382US5350316AFluorescent-lamp leadless ballast with improved connectorMAGNETEK INC·Filed 1993·Granted Sep 27, 1994·48 cites·25 claims
- 1481US6956339B1Multiple hoist synchronization apparatus and methodMAGNETEK INC·Filed 2003·Granted Oct 18, 2005·25 cites·13 claims
- 1581US5654620ASensorless speed detection circuit and method for induction motorsMAGNETEK INC·Filed 1995·Granted Aug 5, 1997·55 cites·18 claims
- 1680US9650231B2Method and apparatus for controlling a bucket hoistMAGNETEK INC·Filed 2013·Granted May 16, 2017·8 cites·14 claims
- 1780US5274328ATemperature compensation for magnetostrictive position detectorMAGNETEK INC·Filed 1992·Granted Dec 28, 1993·73 cites·8 claims
- 1879US5260678AFluorescent-lamp leadless ballast with improved connectorMAGNETEK INC·Filed 1991·Granted Nov 9, 1993·41 cites·53 claims
- 1978US7841583B1System and method for detecting a discontinuity in a mechanical drive trainMAGNETEK INC·Filed 2006·Granted Nov 30, 2010·14 cites·32 claims
- 2078US5535625AIntegrated liquid level and auxiliary sensor system and methodMAGNETEK INC·Filed 1994·Granted Jul 16, 1996·37 cites·11 claims
- 2178US5204595AMethod and apparatus for controlling a walking beam pumpMAGNETEK INC·Filed 1991·Granted Apr 20, 1993·55 cites·10 claims
- 2277US5817975AHousing with integral mounting bracketMAGNETEK INC·Filed 1995·Granted Oct 6, 1998·54 cites·7 claims
- 2376US6051940ASafety control circuit for detecting the removal of lamps from a ballast and reducing the through-lamp leakage currentsMAGNETEK INC·Filed 1998·Granted Apr 18, 2000·87 cites·15 claims
- 2476US5838181APulse-width modulator circuit for use in low-cost power factor correction circuitMAGNETEK INC·Filed 1996·Granted Nov 17, 1998·38 cites·13 claims
- 2576US5831395AThree-way fluorescent adapterMAGNETEK INC·Filed 1996·Granted Nov 3, 1998·55 cites·27 claims
- 2676US5253521AMethod of transmitting measured temperature and position parameters from a transducerMAGNETEK INC·Filed 1992·Granted Oct 19, 1993·43 cites·10 claims
- 2775US5258707AMethod of noise rejection in a magnetostrictive position detector including determining a valid time range for propagation of sonic pulses over a reference distanceMAGNETEK INC·Filed 1992·Granted Nov 2, 1993·35 cites·4 claims
- 2874US7190146B1Control system and method for an overhead bridge craneMAGNETEK INC·Filed 2003·Granted Mar 13, 2007·15 cites·22 claims
- 2974US6588713B2Anchor assembly for electrified conductor barMAGNETEK INC·Filed 2002·Granted Jul 8, 2003·33 cites·15 claims
- 3074US5001377ALubrication system with inlet and outlet packetsMAGNETEK INC·Filed 1990·Granted Mar 19, 1991·34 cites·14 claims
- 3174US4686427AFluorescent lamp dimming switchMAGNETEK INC·Filed 1986·Granted Aug 11, 1987·34 cites·14 claims
- 3272US6653804B1Method and apparatus for controlling a bucket hoist using a flux vector AC driveMAGNETEK INC·Filed 2001·Granted Nov 25, 2003·30 cites·25 claims
- 3372US6031340ADevice and method for capacitive bi-level switching of high intensity discharge lightingMAGNETEK INC·Filed 1998·Granted Feb 29, 2000·56 cites·11 claims
- 3472US5877592AProgrammed-start parallel-resonant electronic ballastMAGNETEK INC·Filed 1996·Granted Mar 2, 1999·52 cites·24 claims
- 3572US4766337AOpen drip-proof machinery cooling system using totally enclosed type bearing bracketsMAGNETEK INC·Filed 1987·Granted Aug 23, 1988·41 cites·21 claims
- 3671US5885676APlastic tube and method and apparatus for manufacturingMAGNETEK INC·Filed 1995·Granted Mar 23, 1999·47 cites·10 claims
- 3770US5204587AFluorescent lamp power controlMAGNETEK INC·Filed 1991·Granted Apr 20, 1993·30 cites·15 claims
- 3869US5959408ASymmetry control circuit for pre-heating in electronic ballastsMAGNETEK INC·Filed 1997·Granted Sep 28, 1999·38 cites·13 claims
- 3969US4872127ARipple rejection filterMAGNETEK INC·Filed 1988·Granted Oct 3, 1989·27 cites·39 claims
- 4067US5463522AHousing and mounting arrangement for thermal protector deviceMAGNETEK INC·Filed 1993·Granted Oct 31, 1995·20 cites·13 claims
- 4166US6274987B1Power sensing lamp protection circuit for ballasts driving gas discharge lampsMAGNETEK INC·Filed 1996·Granted Aug 14, 2001·27 cites·19 claims
- 4266US5650925ADiode clamping arrangement for use in electronic ballastsMAGNETEK INC·Filed 1996·Granted Jul 22, 1997·27 cites·4 claims
- 4366US5192905ACharging voltage control and current limit for battery chargersMAGNETEK INC·Filed 1991·Granted Mar 9, 1993·46 cites·22 claims
- 4465US5825639ADC bus capacitor arrangementMAGNETEK INC·Filed 1997·Granted Oct 20, 1998·32 cites·4 claims
- 4562US5821649AElectrostatic shielding system for reduction of bearing currents in electric motorsMAGNETEK INC·Filed 1995·Granted Oct 13, 1998·29 cites·14 claims
- 4662US5729450APower converter with ripple current and bulk filtering supplied by high-current, high-microfarad film capacitor arrangementMAGNETEK INC·Filed 1995·Granted Mar 17, 1998·40 cites·4 claims
- 4762US4683392AEddy current coupling having stepped rotor and coil supportMAGNETEK INC·Filed 1982·Granted Jul 28, 1987·19 cites·2 claims
- 4857US5737210ABridge rectifier configuration and mounting for supplying exciter current in an AC generatorMAGNETEK INC·Filed 1996·Granted Apr 7, 1998·28 cites·10 claims
- 4957US4761580AMagnetic top wedgeMAGNETEK INC·Filed 1987·Granted Aug 2, 1988·22 cites·11 claims
- 5056US12404147B2System and method of detecting a dragging brake in an elevator applicationMAGNETEK INC·Filed 2021·Granted Sep 2, 2025·0 cites·20 claims
Showing the top 50 of 93 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when MAGNETEK INC files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →