| Patents for H05B 39 - Circuit arrangements or apparatus for operating incandescent light sources and not adapted to a particular application (6,420) |
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| 10/16/1990 | US4963798 Synthesized lighting device |
| 10/16/1990 | US4963793 Delayed response touch switch controller |
| 10/16/1990 | US4962687 Variable color lighting system |
| 10/11/1990 | DE3911005A1 Circuit for feeding low-voltage lamps |
| 10/10/1990 | CN2063731U Program controller for musical color lamp |
| 10/10/1990 | CN2063730U Soft starting arrangement for prolonging bulb service life |
| 10/10/1990 | CN2063724U Both touch and turn-on-off controllable time delay switch for passageway |
| 10/10/1990 | CN2063722U Energy-saving time-delay switch |
| 10/03/1990 | CN2063332U Healthy table lamp with automatically constant light intensity |
| 10/03/1990 | CN2063331U 电子蜡烛 Candle |
| 09/26/1990 | CN2062935U Contactless steering flash relay for motor-driven vehicle |
| 09/26/1990 | CN2062934U Automatic controlling switch for public incandescent lamp |
| 09/25/1990 | US4959755 Automatic battery powered video light |
| 09/25/1990 | US4959556 Circuit arrangement for deriving a direct voltage from the mains alternating voltage |
| 09/19/1990 | CN2062540U Warning lamp controlled by microwave switch |
| 09/19/1990 | CN2062539U Automatic lamp turn-off device |
| 09/19/1990 | CN2062538U Multi-purpose desk lamp for curing weak sight |
| 09/19/1990 | CN2062537U Stepless light adjusting switch mounted on wall |
| 09/19/1990 | CN2062498U Optical controlled lamp |
| 09/19/1990 | CN2062408U Shortsightedness prevention desk lamp |
| 09/12/1990 | CN2062142U Sound controller for stroboscopic lamp |
| 09/12/1990 | CN2062136U Xfe-1 microwave remote trigger switch and light intensity regulator thereof |
| 09/05/1990 | EP0385844A1 Lighting device for a landing strip |
| 09/05/1990 | CN2061744U Electricity-economizing switch |
| 09/04/1990 | US4954768 Two wire low voltage dimmer |
| 09/04/1990 | US4954718 Circuit arrangement for driving a pulse-modulated infrared-radiation source |
| 08/29/1990 | CN2061356U Electricity-saving switch |
| 08/29/1990 | CN1045013A Controller circuit for regulating light |
| 08/22/1990 | CN2060940U Light-adjusting wall switches |
| 08/16/1990 | EP0382357A1 Dimmer modules for lighting control systems |
| 08/15/1990 | CN2060614U Signal electronic flasher for the steering of automobile |
| 08/15/1990 | CN2060613U Miniature electronic induction lamp |
| 08/14/1990 | US4949014 Device for regulating luminous flux of battery powered headlamp |
| 08/08/1990 | EP0380833A1 Reverse phase-controlled dimmer |
| 08/07/1990 | US4947087 Lamp-lighting device |
| 08/02/1990 | DE4001526A1 Verfahren zur dimensionierung und zum betrieb einer niederdruckentladungslampe A method for sizing and operation of a low-pressure discharge lamp |
| 08/01/1990 | CN2060029U Automatic light-changing controller for illuminator |
| 07/31/1990 | USRE33285 Touch controlled switch for a lamp or the like |
| 07/31/1990 | US4945291 Lamp-lighting device |
| 07/31/1990 | CA1272052A1 Multi-bulb light source |
| 07/26/1990 | WO1990008450A1 Electric sparkler |
| 07/26/1990 | WO1990008399A1 Method of dimensioning and operating a low pressure discharge lamp |
| 07/26/1990 | DE3901766A1 Elektrische wunderkerze Electrical sparkler |
| 07/24/1990 | US4943884 Arrangement operable to power a load from a source of AC voltage |
| 07/12/1990 | WO1990007855A1 Improved dimming control circuit |
| 07/11/1990 | CN2059287U Sight protector |
| 07/04/1990 | CN2059039U No-contact lighting relay |
| 07/03/1990 | US4939428 Touch switching system |
| 07/03/1990 | US4939382 Touch responsive power control system |
| 06/28/1990 | DE3843343A1 Film-viewing device |
| 06/27/1990 | EP0375289A2 Electric lighting and power controllers therefor |
| 06/27/1990 | EP0375288A1 Electric lighting and power controllers therefor |
| 06/26/1990 | US4937702 Light intensity controller using a proximity sensor |
| 06/19/1990 | US4935641 Power control circuit |
| 06/19/1990 | US4935633 Low power infrared source assembly for spectrometer |
| 06/13/1990 | CN2058296U Auto-controlling switch for illumination lamp |
| 06/13/1990 | CN1043064A Improved control circuit of auto-electric lamps |
| 06/06/1990 | CN1042797A Axial ratchet type pull-rod switch |
| 05/31/1990 | WO1990005948A1 Lighting control system and module |
| 05/31/1990 | DE3839761A1 Circuit for controlling the operation of an incandescent lamp |
| 05/30/1990 | CN2057798U Multi-functional electricity-saving switch |
| 05/29/1990 | US4929872 Light bulb socket soft start and power interrupt assembly |
| 05/29/1990 | US4929815 Heating resistor driving circuit which suppresses current spikes |
| 05/23/1990 | CN2057531U Universal light-regulating energy-saving switch with two-key |
| 05/22/1990 | US4928055 Control circuit for heat fixing device for use in an image forming apparatus |
| 05/08/1990 | US4924109 Dim-down electric light time switch method and apparatus |
| 05/01/1990 | US4922155 Protective circuit for reduced voltage lamps |
| 05/01/1990 | US4922154 Chromatic lighting display |
| 04/25/1990 | CN2056541U Switch with light-variable and increasing service life for electric incandesent lamp |
| 04/24/1990 | USRE33205 Linear analog light-level monitoring system having short leads to reduce electronic noise |
| 04/18/1990 | EP0364161A2 Control circuit of the decorative light sets |
| 04/17/1990 | US4918357 Combination incandescent and solar-electric light bulb with automatic switching device and charging means therefor |
| 04/11/1990 | CN2056004U Lamplight controller |
| 04/11/1990 | CN2055999U Subminiature lossless time-delay and electricity-saving electronic switch |
| 04/04/1990 | EP0361734A1 Master electrical load control |
| 04/04/1990 | EP0361706A1 Lighting device |
| 04/04/1990 | CN2055660U Light-controlled warning lamp |
| 04/04/1990 | CN1041077A Electronic dreamy coloured light with automatically-changed and arbitrarily-selected colours |
| 03/14/1990 | CN2054609U Direction-selecting electricity-saving controller |
| 03/08/1990 | WO1990002473A1 Programmable light switch |
| 03/08/1990 | WO1990002472A1 Reduced power switch |
| 03/07/1990 | EP0357285A2 Power supply for outdoor lighting systems |
| 03/07/1990 | CN2054249U Colour changing lamp set |
| 03/07/1990 | CN2054248U Lamp set for boosting and regulating voltage of incandescent light |
| 03/07/1990 | CN2054139U Desk lamp |
| 03/06/1990 | US4906901 Power supply for outdoor lighting systems using high frequency |
| 03/01/1990 | DE3828702A1 Luminaire having a plurality of light sources of low-voltage halogen lamps and an AC power controller |
| 03/01/1990 | DE3828434A1 Programmierbarer lichtschalter Programmable Light Switch |
| 02/28/1990 | CN2053834U Energy-saving time delay switch |
| 02/28/1990 | CN2053833U Electricity-saving controller for street lamp |
| 02/21/1990 | CN2053409U Multifunctional energy-saving switch |
| 02/21/1990 | CN1039945A Technology of saving lighting electricity |
| 02/20/1990 | US4902958 Incandescent light regulation and intensity controller |
| 02/20/1990 | US4902936 Light adjusting apparatus |
| 02/14/1990 | CN2053005U Colour lamp string controller |
| 02/14/1990 | CN2053004U Colour lamp and lantern with power saving automatic controlled adjuster |
| 02/14/1990 | CN2053003U Simple touching type self time delay switch |
| 02/14/1990 | CN2052954U Longlife power saving cusion for incandescent lamp |
| 02/14/1990 | CN2052943U Pull switch with on-off indicator capable of lengthening lamp servicelife |
| 02/14/1990 | CN2052941U Electronic pull switch for prolonging serrice life |