Inventor · disambiguated record
Joseph S. Droho
Also filed as: DROHO JOSEPH · DROHO JOSEPH S
17 granted patents·223 citations·filing 1981–1995
94Inventor score
Top patents by PatentIndex Score
17 records- 0193US4977346AHigh pressure sodium discharge lamp having gas filled outer envelopePHILIPS CORP·Filed 1989·Granted Dec 11, 1990·65 cites·8 claims
- 0275US5430354AHID lamp and auxiliary lamp ballast using a single multiple function switchPHILIPS CORP·Filed 1992·Granted Jul 4, 1995·36 cites·28 claims
- 0365US5103153AControl equipment for multi-speed electric motorsPHILIPS CORP·Filed 1988·Granted Apr 7, 1992·19 cites·8 claims
- 0464US4406976ADischarge lamp ballast circuitADVANCE TRANSFORMER CO·Filed 1981·Granted Sep 27, 1983·20 cites·14 claims
- 0560US4740861AThermal protection device for a dual input voltage lamp transformer/ballast apparatusADVANCE TRANSFORMER CO·Filed 1986·Granted Apr 26, 1988·18 cites·15 claims
- 0653US5013977AIgnitor for high pressure arc discharge lampsPHILIPS CORP·Filed 1990·Granted May 7, 1991·15 cites·14 claims
- 0750US4939430AIgnitor circuit for discharge lamps with novel ballastADVANCE TRANSFORMER CO·Filed 1987·Granted Jul 3, 1990·13 cites·13 claims
- 0844US5440286AElectrical transformer structure with coil coversPHILIPS CORP·Filed 1994·Granted Aug 8, 1995·10 cites·8 claims
- 0944US4847535AHybrid ballast for multiple discharge lampsADVANCE TRANSFORMER CO·Filed 1983·Granted Jul 11, 1989·9 cites·7 claims
- 1034US5072156ABallast circuit with means to disconnect power factor capacitorPHILIPS CORP·Filed 1990·Granted Dec 10, 1991·5 cites·8 claims
- 1132US5574419AUnique electrical coil with tapPHILIPS ELECTRONICS NA·Filed 1994·Granted Nov 12, 1996·2 cites·5 claims
- 1232US5017840AIgnitor circuit for discharge lamps with novel ballastPHILIPS CORP·Filed 1990·Granted May 21, 1991·4 cites·14 claims
- 1330US4593231AThree-way fluorescent lamp deviceADVANCE TRANSFORMER CO·Filed 1984·Granted Jun 3, 1986·3 cites·59 claims
- 1429US5485669AMethod of making an electrical coilPHILIPS ELECTRONICS NA·Filed 1995·Granted Jan 23, 1996·0 cites·8 claims
- 1529US5175469ACombination including an emergency lighting arrangementPHILIPS CORP·Filed 1991·Granted Dec 29, 1992·1 cites·12 claims
- 1629US5132870AIgnitor circuit for discharge lamps with novel ballastPHILIPS CORP·Filed 1991·Granted Jul 21, 1992·1 cites·2 claims
- 1724US5051664AIgnitor circuit for discharge lamps with novel ballastDROHO JOSEPH S·Filed 1991·Granted Sep 24, 1991·2 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →