Magnetek, Inc.
🏢 View company profile →105Patents
18Active
105Granted
49Portfolio score
Filing activity: Oct 19, 1979 → Nov 17, 2022 · 2 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5751118A | Universal input dimmer interface | Emerging Cross-Sectional Technologies | 182 | Expired |
| US5583402A | Symmetry control circuit and method | Emerging Cross-Sectional Technologies | 114 | Expired |
| US5568041A | Low-cost power factor correction circuit and method for electronic ballasts | Emerging Cross-Sectional Technologies | 83 | Expired |
| US5731666A | Integrated-magnetic filter having a lossy shunt | Electricity | 54 | Expired |
| US5817975A | Housing with integral mounting bracket | Electricity | 52 | Expired |
| US6051940A | Safety control circuit for detecting the removal of lamps from a ballast and reducing the through-lamp leakage currents | Emerging Cross-Sectional Technologies | 48 | Expired |
| US5932995A | Dual buck converter with coupled inductors | Electricity | 47 | Expired |
| US5488268A | Electrical connector with improved centering of mating terminal pins, for a fluorescent-lighting ballast | Electricity | 45 | Expired |
| US5274328A | Temperature compensation for magnetostrictive position detector | Emerging Cross-Sectional Technologies | 45 | Expired |
| US5654620A | Sensorless speed detection circuit and method for induction motors | Electricity | 44 | Expired |
| US5788527A | Electrical connector with improved safety latching for a fluorescent-lighting ballast | Electricity | 41 | Expired |
| US5204595A | Method and apparatus for controlling a walking beam pump | Fixed Constructions | 37 | Expired |
| US5635799A | Lamp protection circuit for electronic ballasts | Electricity | 37 | Expired |
| US6031340A | Device and method for capacitive bi-level switching of high intensity discharge lighting | Emerging Cross-Sectional Technologies | 36 | Expired |
| US6598859B1 | Multiple hoist synchronization apparatus and method | Performing Operations; Transporting | 34 | Expired |
| US5831395A | Three-way fluorescent adapter | Emerging Cross-Sectional Technologies | 33 | Expired |
| US5253521A | Method of transmitting measured temperature and position parameters from a transducer | Physics | 30 | Expired |
| US5877592A | Programmed-start parallel-resonant electronic ballast | Emerging Cross-Sectional Technologies | 30 | Expired |
| US4686427A | Fluorescent lamp dimming switch | Emerging Cross-Sectional Technologies | 30 | Expired |
| US6204602A | Compact fluorescent lamp and ballast assembly with an air gap for thermal isolation | Emerging Cross-Sectional Technologies | 29 | Expired |
| US5914547A | Auxiliary bearing assembly for reduction of unwanted shaft voltages in an electric motor | Electricity | 28 | Expired |
| US5260678A | Fluorescent-lamp leadless ballast with improved connector | Emerging Cross-Sectional Technologies | 27 | Expired |
| US6588713B2 | Anchor assembly for electrified conductor bar | Electricity | 27 | Expired |
| US5192905A | Charging voltage control and current limit for battery chargers | Electricity | 26 | Expired |
| US5350316A | Fluorescent-lamp leadless ballast with improved connector | Emerging Cross-Sectional Technologies | 26 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.