Assignee
MATSUSHITA ELECTRIC WORKS R &
US·20 granted patents·1 pending application·908 citations·filing 1994–2002
Top patents by PatentIndex Score
21 records- 0194US5932976ADischarge lamp drivingMATSUSHITA ELECTRIC WORKS R &·Filed 1997·Granted Aug 3, 1999·238 cites·23 claims
- 0291US6380694B1Variable structure circuit topology for HID lamp electronic ballastsMATSUSHITA ELECTRIC WORKS R &·Filed 2000·Granted Apr 30, 2002·70 cites·15 claims
- 0389US6034489AElectronic ballast circuitMATSUSHITA ELECTRIC WORKS R &·Filed 1997·Granted Mar 7, 2000·106 cites·22 claims
- 0489US6020691ADriving circuit for high intensity discharge lamp electronic ballastMATSUSHITA ELECTRIC WORKS R &·Filed 1999·Granted Feb 1, 2000·89 cites·35 claims
- 0584US6081070AHigh-frequency electrodeless fluorescent lampMATSUSHITA ELECTRIC WORKS R &·Filed 1998·Granted Jun 27, 2000·47 cites·16 claims
- 0683US6144172AMethod and driving circuit for HID lamp electronic ballastMATSUSHITA ELECTRIC WORKS R &·Filed 1999·Granted Nov 7, 2000·59 cites·24 claims
- 0779US5986901APower factor correction circuit for a power supplyMATSUSHITA ELECTRIC WORKS R &·Filed 1998·Granted Nov 16, 1999·46 cites·23 claims
- 0877US6448720B1Circuit for driving an HID lampMATSUSHITA ELECTRIC WORKS R &·Filed 2001·Granted Sep 10, 2002·21 cites·40 claims
- 0974US5541477ASelf ballasted compact fluorescent lampMATSUSHITA ELECTRIC WORKS R &·Filed 1994·Granted Jul 30, 1996·28 cites·5 claims
- 1074US5500574AInductively coupled substantially flat fluorescent light sourceMATSUSHITA ELECTRIC WORKS R &·Filed 1994·Granted Mar 19, 1996·25 cites·9 claims
- 1173US5592052AVariable color temperature fluorescent lampMATSUSHITA ELECTRIC WORKS R &·Filed 1995·Granted Jan 7, 1997·26 cites·17 claims
- 1270US5690421ADisplay lighting with matched narrow band filter and light sourceMATSUSHITA ELECTRIC WORKS R &·Filed 1995·Granted Nov 25, 1997·29 cites·13 claims
- 1369US5959410ACharge pump power factor correction circuit for power supply for gas discharge lampMATSUSHITA ELECTRIC WORKS R &·Filed 1997·Granted Sep 28, 1999·41 cites·46 claims
- 1464US5455484AAdapter for simultaneously powering multiple compact fluorescent lamps utilizing an electronic ballast circuitMATSUSHITA ELECTRIC WORKS R &·Filed 1994·Granted Oct 3, 1995·25 cites·6 claims
- 1555US5777431ASubstantially flat compact fluorescent lampMATSUSHITA ELECTRIC WORKS R &·Filed 1994·Granted Jul 7, 1998·11 cites·5 claims
- 1654US5990624AColor sulfur lamp including means for intercepting and re-mitting light of a desired spectral distributionMATSUSHITA ELECTRIC WORKS R &·Filed 1995·Granted Nov 23, 1999·11 cites·17 claims
- 1751US5834904AMeans for suppressing electromagnetic interference from RF-excited light sourcesMATSUSHITA ELECTRIC WORKS R &·Filed 1995·Granted Nov 10, 1998·19 cites·15 claims
- 1849US6121730AMetal hydrides lamp and fill for the sameMATSUSHITA ELECTRIC WORKS R &·Filed 1998·Granted Sep 19, 2000·8 cites·24 claims
- 1939US5637965ALow pressure sodium-mercury lamp yielding substantially white lightMATSUSHITA ELECTRIC WORKS R &·Filed 1995·Granted Jun 10, 1997·4 cites·18 claims
- 2037US2003234714A1Winding device and method for manufacturing the sameMATSUSHITA ELECTRIC WORKS R &·Filed 2002·Application pending·0 cites
- 2135US6366020B1Universal operating DC ceramic metal halide lampMATSUSHITA ELECTRIC WORKS R &·Filed 1999·Granted Apr 2, 2002·5 cites·10 claims
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