Assignee
HELVAR OY
FI·11 granted patents·245 citations·filing 1980–1995
Top patents by PatentIndex Score
11 records- 0186US4553070AElectronic ballast for a discharge lampHELVAR OY·Filed 1982·Granted Nov 12, 1985·64 cites·6 claims
- 0282US5844516AMethod and apparatus for wireless remote controlHELVAR OY·Filed 1995·Granted Dec 1, 1998·80 cites·20 claims
- 0371US4456855AIntensity regulator, especially a light regulatorHELVAR OY·Filed 1982·Granted Jun 26, 1984·22 cites·8 claims
- 0466US4719390AElectronic mains connection device for a gas discharge lampHELVAR OY·Filed 1984·Granted Jan 12, 1988·24 cites·9 claims
- 0550US5034660AMethod of and apparatus for supplying high frequency alternating current to a fluorescence lampHELVAR OY·Filed 1988·Granted Jul 23, 1991·14 cites·6 claims
- 0646US5552676AControl device for an appliance consuming electric powerHELVAR OY·Filed 1994·Granted Sep 3, 1996·11 cites·27 claims
- 0746US4603378AInverter circuit with a control circuit for leading transistors more effectively into a turned-off stateHELVAR OY·Filed 1984·Granted Jul 29, 1986·11 cites·3 claims
- 0836US5410220AControl circuit for drive circuit of an electronic ballast for a discharge lampHELVAR OY·Filed 1993·Granted Apr 25, 1995·13 cites·10 claims
- 0934US5691604AMethod and circuit system for controlling a lighting electronics applianceHELVAR OY·Filed 1995·Granted Nov 25, 1997·5 cites·12 claims
- 1028US5698950ASuppressor for an electronic ballast in a discharge lampHELVAR OY·Filed 1995·Granted Dec 16, 1997·0 cites·15 claims
- 1112US4296545ACasing hook used to impregnate choke or transformerHELVAR OY·Filed 1980·Granted Oct 27, 1981·1 cites·6 claims
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