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Rapid starting of gas discharge lamps
Patent #: 3944876
Issued on: 03/16/1976
Inventor: Helmuth
Power supply for a laser or gas discharge lamp
Patent #: 3967159
Issued on: 06/29/1976
Inventor: Dendy , et al.
Electronic ballast for gaseous discharge lamps
Patent #: 3969652
Issued on: 07/13/1976
Inventor: Herzog
Lamp power supply using a switching regulator and commutator
Patent #: 3999100
Issued on: 12/21/1976
Inventor: Dendy , et al.
Push-pull inverter ballast for arc discharge lamps
Patent #: 4004187
Issued on: 01/18/1977
Inventor: Walker
Starting circuit for inverter operated gaseous discharge lamps
Patent #: 4004188
Issued on: 01/18/1977
Inventor: Cooper
High pressure discharge lamp dimming circuit utilizing variable duty-cycle photocoupler
Patent #: 4016451
Issued on: 04/05/1977
Inventor: Engel
Inverter ballast circuit
Patent #: 4023067
Issued on: 05/10/1977
Inventor: Zelina , et al.
System for controlling power applied to a gas discharge lamp
Patent #: 4039897
Issued on: 08/02/1977
Inventor: Dragoset
Chopper ballast for gaseous discharge lamps with auxiliary capacitor energy storage
Patent #: 4042856
Issued on: 08/16/1977
Inventor: Steigerwald
Transistorized static inverters
Patent #: 4051413
Issued on: 09/27/1977
Inventor: Abadie
Dual mode solid state inverter circuit for starting and ballasting gas discharge lamps
Patent #: 4060751
Issued on: 11/29/1977
Inventor: Anderson
Discharge lamp auxiliary circuit with dI/dt switching control
Patent #: 4060752
Issued on: 11/29/1977
Inventor: Walker
Energizing circuits for fluorescent lamps
Patent #: 4066930
Issued on: 01/03/1978
Inventor: Summa
Voltage regulator with thermal overload protection
Patent #: 4074170
Issued on: 02/14/1978
Inventor: Orban
Digital electronic dimmer
Patent #: 4087702
Issued on: 05/02/1978
Inventor: Kirby, et al.
Combination incandescent/fluorescent lighting system
Patent #: 4100462
Issued on: 07/11/1978
Inventor: McLellan
Apparatus for feeding discharge lamps from a direct current source
Patent #: 4121136
Issued on: 10/17/1978
Inventor: Fournier , et al.
Light-pervious, heat-reflecting filter and electric lamps having such a filter
Patent #: 4127789
Issued on: 11/28/1978
Inventor: Kostlin , et al.
Lamp ballast circuit
Patent #: 4127795
Issued on: 11/28/1978
Inventor: Knoll
Fluorescent lamp driving circuit
Patent #: 4145636
Issued on: 03/20/1979
Inventor: Doi
Instant light lamp control circuit
Patent #: 4151445
Issued on: 04/24/1979
Inventor: Davenport , et al.
Method and apparatus for saving energy
Patent #: 4156166
Issued on: 05/22/1979
Inventor: Shapiro , et al.
Variable duty cycle lamp circuit
Patent #: 4163923
Issued on: 08/07/1979
Inventor: Herbers , et al.
Fixed frequency, variable duty cycle, square wave dimmer for high intensity gaseous discharge lamp
Patent #: 4170747
Issued on: 10/09/1979
Inventor: Holmes
Ballast circuit for high intensity discharge (HID) lamps
Patent #: 4199710
Issued on: 04/22/1980
Inventor: Knoll
Adjustable DC pulse circuit for variation over a predetermined range using two timer networks
Patent #: 4204141
Issued on: 05/20/1980
Inventor: Nuver
Inverter circuit for energizing and dimming gas discharge lamps
Patent #: 4210846
Issued on: 07/01/1980
Inventor: Capewell , et al.
SEF Lamp dimming
Patent #: 4219760
Issued on: 08/26/1980
Inventor: Ferro
Lighting network including a gas discharge lamp and standby lamp
Patent #: 4232252
Issued on: 11/04/1980
Inventor: Peil
Ballast circuit for low pressure gas discharge lamp
Patent #: 4234823
Issued on: 11/18/1980
Inventor: Charlot
Lighting circuits
Patent #: 4236100
Issued on: 11/25/1980
Inventor: Nuver
Light control system
Patent #: 4236101
Issued on: 11/25/1980
Inventor: Luchaco
Power supply for fluorescent lamp
Patent #: 4237403
Issued on: 12/02/1980
Inventor: Davis
Symmetry regulated high frequency ballast
Patent #: 4238710
Issued on: 12/09/1980
Inventor: Nelson
Electronic ballast
Patent #: 4240009
Issued on: 12/16/1980
Inventor: Paul
Digital lighting control system
Patent #: 4241295
Issued on: 12/23/1980
Inventor: Williams, Jr.
Inverter for operating a gaseous discharge lamp
Patent #: 4245177
Issued on: 01/13/1981
Inventor: Schmitz
Solid state electronic ballast system for fluorescent lamps
Patent #: 4251752
Issued on: 02/17/1981
Inventor: Stolz
Variable intensity control apparatus for operating a gas discharge lamp
Patent #: 4253046
Issued on: 02/24/1981
Inventor: Gerhard , et al.
Electronic ballast-inverter for multiple fluorescent lamps
Patent #: 4259614
Issued on: 03/31/1981
Inventor: Kohler
Power supply for a high intensity discharge or fluorescent lamp
Patent #: 4277728
Issued on: 07/07/1981
Inventor: Stevens
Dimmer circuit for fluorescent lamps
Patent #: 4286195
Issued on: 08/25/1981
Inventor: Swinea, Jr.
Dimmer control system
Patent #: 4287468
Issued on: 09/01/1981
Inventor: Sherman
Process for maintaining an electric oscillation circuit and horizontal deflection device for a cathode-ray tube
Patent #: 4316127
Issued on: 02/16/1982
Inventor: Lamoureux
Switching regulated pulse width modulated push-pull converter
Patent #: 4322817
Issued on: 03/30/1982
Inventor: Kuster
Low voltage fluorescent operating circuit
Patent #: 4323824
Issued on: 04/06/1982
Inventor: Roche , et al.
Feedback control system for applying AC power to ballasted lamps
Patent #: 4346331
Issued on: 08/24/1982
Inventor: Hoge
Discharge lamp operating circuit
Patent #: 4348615
Issued on: 09/07/1982
Inventor: Garrison , et al.
Lighting unit
Patent #: 4350930
Issued on: 09/21/1982
Inventor: Peil , et al.
Adjustable electrical power control for gas discharge lamps and the like
Patent #: 4358716
Issued on: 11/09/1982
Inventor: Cordes , et al.
High pressure discharge lamp apparatus
Patent #: 4370601
Issued on: 01/25/1983
Inventor: Horii , et al.
High pressure discharge lamp apparatus
Patent #: 4378513
Issued on: 03/29/1983
Inventor: Yoshikawa , et al.
Electronic ballast circuit
Patent #: 4388562
Issued on: 06/14/1983
Inventor: Josephson
Start up frequency adjustment in an electronic power device for a discharge lamp
Patent #: 4412154
Issued on: 10/25/1983
Inventor: Klein
Electronic ballast for gaseous discharge lamps
Patent #: 4415839
Issued on: 11/15/1983
Inventor: Lesea
Lighting control for high intensity discharge lamp
Patent #: 4437043
Issued on: 03/13/1984
Inventor: Pitel
Pulse width modulated dimming arrangement for fluorescent lamps
Patent #: 4464606
Issued on: 08/07/1984
Inventor: Kane
Variable frequency current control device for discharge lamps
Patent #: 4498031
Issued on: 02/05/1985
Inventor: Stupp , et al.
Device for starting and operating gas discharge tubes
Patent #: 4511195
Issued on: 04/16/1985
Inventor: Barter
Varible frequency current control device for discharge lamps Patent #: 4585974
Issued on: 04/29/1986
Inventor: Stupp , et al.
June 18, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
