| Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
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| 01/17/1990 | CN1006518B Printed resister, its fabrication and use |
| 01/16/1990 | US4894678 Camera for forming a photographic image |
| 01/16/1990 | US4894592 Electrodeless lamp energized by microwave energy |
| 01/16/1990 | US4894591 Inverted Excitation coil for HID lamps |
| 01/16/1990 | US4894589 Starting means, with piezoelectrically-located capacitive starting electrodes, for HID lamps |
| 01/16/1990 | US4894587 High frequency gas discharge lamp dimming ballast |
| 01/11/1990 | DE3823024A1 Device for changing the voltage of a winding of a star-connected three-phase autotransformer |
| 01/10/1990 | EP0350104A2 A signal generating circuit for ballast control of discharge lamps |
| 01/10/1990 | EP0349707A1 Bi-level ballast circuit for operating hid lamps |
| 01/09/1990 | US4893064 Operating system for skin treatment apparatus |
| 01/09/1990 | US4893061 Switching arrangement |
| 01/09/1990 | US4893059 For a fluorescent lamp |
| 01/09/1990 | CA1264350A1 Illuminator for cultivating plant |
| 01/03/1990 | CN2050671U Automatic cut-out device of flash lamp |
| 01/03/1990 | CN2050656U Energy-saving pullswitch of fluorescent lamp |
| 01/03/1990 | CN1006355B Energy-saving electronic neon generator |
| 01/02/1990 | US4891563 Circuit arrangement for adjusting the operating voltage of high-pressure gas discharge lamps |
| 01/02/1990 | US4891562 Hybrid regulator-ballast circuit for high intensity discharge lamps |
| 01/02/1990 | US4891561 Neon tube lighting device |
| 12/28/1989 | WO1989012951A1 Process and switchgear for regulating the light intensity of gas-discharge tubes |
| 12/27/1989 | EP0347427A1 Circuit arrangement for operating a gas discharge lamp on a direct current source. |
| 12/27/1989 | CN2050251U Self-compensation energy-saving ballast |
| 12/27/1989 | CN2050250U Low-voltage startar for fluorescent lamp |
| 12/26/1989 | US4890041 High wattage HID lamp circuit |
| 12/26/1989 | US4890039 Fluorescent lamp resonant ballast |
| 12/20/1989 | CN2049823U Low-voltage electronic neon lamp |
| 12/19/1989 | US4888528 Method of and apparatus for ultrahigh frequency starting of high intensity discharge lamps |
| 12/19/1989 | US4888527 Reactance transformer control for discharge devices |
| 12/19/1989 | US4888526 Operating system for sun tanning apparatus |
| 12/19/1989 | US4888525 Sun tanning apparatus having electronic operating system |
| 12/19/1989 | US4888524 Circuit for operating gas discharge lamps with a periodically alternating lamp current |
| 12/19/1989 | US4888494 Electromechanical lamp switching |
| 12/14/1989 | WO1989012377A1 Electronic ballast |
| 12/13/1989 | CN2049455U Energy-saving light adjustable dc or ac h type desk lamp |
| 12/13/1989 | CN2049454U Super high efficiency dual-compatible inverting source non-polarity neon light |
| 12/13/1989 | CN2049453U Electronic starting switch of fluorescent lamp |
| 12/12/1989 | US4887192 Electrodeless lamp having compound resonant structure |
| 12/12/1989 | US4887122 Copying machine |
| 12/12/1989 | US4887007 DC-AC converter for supplying a gas and/or vapour discharge lamp |
| 12/07/1989 | DE3914676A1 Spannungsversorgungsschaltung fuer eine leuchtstofflampe Power supply circuit for a fluorescent lamp |
| 12/06/1989 | CN2049063U Protector for fluorescent lamp trouble |
| 12/05/1989 | US4885671 Pulse-by-pulse current mode controlled power supply |
| 12/05/1989 | US4885508 System for controlling the intensity of high power lights |
| 12/05/1989 | US4885507 Electronic starter combined with the L-C ballast of a fluorescent lamp |
| 12/05/1989 | CA1263690A1 Fluorescent lamp operating circuit |
| 12/05/1989 | CA1263689A1 Fluorescent light controller |
| 11/29/1989 | CN2048669U Power saving daylight lamp without starter |
| 11/29/1989 | CN2048668U Starter for fluorescent lamp |
| 11/29/1989 | CN2048667U High efficient lamp starter |
| 11/29/1989 | CN1005956B High frequency starting and current-limiting method and its apparatus for gas discharge lamp |
| 11/28/1989 | US4882835 Method of making glow discharge starter |
| 11/28/1989 | CA1263433A1 Apparatus for starting and operating a discharge lamp |
| 11/16/1989 | WO1989011204A1 The electronic stabilizer for a fluorescent lamp |
| 11/16/1989 | DE3913033A1 Ballast device for a gas-discharge lamp |
| 11/15/1989 | EP0341601A1 Back light device and video display apparatus using same |
| 11/15/1989 | CN2047875U Non-strobe light capable of controlling the intensity of light |
| 11/15/1989 | CN2047874U Fluorescent lamp starter with light-modulating, energy-saving and regenerative function |
| 11/14/1989 | US4881014 Stabilized electric power apparatus for generating direct and alternating current simultaneously in one transformer |
| 11/14/1989 | US4881013 Flash photographic apparatus |
| 11/14/1989 | US4881012 Switching arrangement |
| 11/14/1989 | US4881011 Control gear for high intensity gas discharge lighting |
| 11/09/1989 | DE3909591A1 Electronic flash gun for generating various, freely selectable partial light quantities |
| 11/08/1989 | CN2047477U 电子镇流器 Electronic Ballast |
| 11/08/1989 | CN1037061A Daylight lamp circuit of all electronic type continuously high effective controlling light |
| 11/07/1989 | US4879495 Illumination control methods and means |
| 11/02/1989 | WO1989010679A1 Electronic ballast circuit for gas discharge lamp |
| 11/02/1989 | EP0340049A1 Supplying device for a luminescent tube |
| 11/01/1989 | CN2047090U 电子镇流器 Electronic Ballast |
| 11/01/1989 | CN2047067U Small power dc gas discharge lamp |
| 10/25/1989 | EP0338109A1 Converter for a discharge lamp |
| 10/25/1989 | CN2046697U Non-inductance type starting ballast and flourescent lamp |
| 10/25/1989 | CN1036630A Electronic clock with double fluorescent lamp |
| 10/24/1989 | US4876486 Two-lead starter circuit for a gaseous discharge lamp |
| 10/24/1989 | US4876485 Ballast for ionic conduction lamps |
| 10/19/1989 | WO1989010047A1 Excitation supply for gas discharge tubes |
| 10/19/1989 | DE3910431A1 Anregungsspule mit reflektierendem ueberzug fuer elektrodenlose hochleistungs-entladungslampe Excitation coil with reflective coating for electrodeless discharge lamp high performance |
| 10/18/1989 | EP0337554A1 Switching arrangement |
| 10/18/1989 | EP0337022A1 Starting assistance device for a gas discharge lamp |
| 10/18/1989 | EP0337021A1 Ignition device for a gas discharge lamp |
| 10/17/1989 | US4874989 Electronic ballast unit with integral light sensor and circuit |
| 10/17/1989 | EP0240519A4 Testing apparatus. |
| 10/11/1989 | EP0336642A1 Excitation supply for gas discharge tubes |
| 10/11/1989 | EP0335881A1 Circuit for driving neon tube to form luminous bubbles and controlling the movement thereof |
| 10/11/1989 | CN2045921U General electronic fluorescent lamp starter |
| 10/11/1989 | CN2045815U Dual-tube energy-saving fluorescent lamp |
| 10/10/1989 | US4873618 Power supply for D.C. arc lamps |
| 10/10/1989 | US4873617 Power supply for arc lamps |
| 10/10/1989 | US4873616 Power supply for arc lamps |
| 10/10/1989 | US4873471 High frequency ballast for gaseous discharge lamps |
| 10/10/1989 | US4873470 Programmable ultraviolet lamp control system |
| 10/10/1989 | CA1262256A1 Dc/ac converter for igniting and feeding a gas and/or vapour discharge lamp |
| 10/05/1989 | DE3809623A1 High pressure discharge lamp of low power |
| 10/04/1989 | EP0335327A2 Starting device for gas discharge lamps |
| 10/04/1989 | EP0334865A1 Fluorescent discharge tube with capacitive ballast, standardized cap, forming a compact assembly |
| 10/04/1989 | CN2045567U High-efficient power saving controller for fluorescent lamp |
| 10/04/1989 | CN1036116A Power saving electronic scanning generator for neon light |
| 09/27/1989 | EP0334356A1 Wall stabilized metal vapour halide discharge lamp |
| 09/27/1989 | EP0334355A2 Wall-stabilized high-pressure discharge lamp |
| 09/27/1989 | CN2045174U Improved measures for power saving long-service-life no-flashing fluorescent lamp |
| 09/27/1989 | CN2045173U Electronic starter for fluorescent lamp |