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| 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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| 11/08/1977 | US4057751 Controlled dimmer lighting system | | 11/01/1977 | US4056716 Defect inspection of objects such as electronic circuits | | 11/01/1977 | US4056378 Method for preparation of VO2 current inrush limiters for incandescent lamps | | 07/19/1977 | US4037135 Solid state timer-stepper with soft switch-on and switch-off load control | | 07/05/1977 | US4034259 Spare lamp control circuit for a light projection system | | 03/15/1977 | US4012663 Lighting control system | | 03/08/1977 | US4011482 Electric circuit control system using exclusive "or" gate | | 02/15/1977 | US4008416 Circuit for producing a gradual change in conduction angle | | 01/25/1977 | US4005338 Lamp-starting device | | 01/25/1977 | US4005334 Electric incandescent lamp combination fixture device | | 12/21/1976 | US3999099 Electrical receptacle device with main lamp and thermostatically-controlled auxiliary lamp sockets | | 11/09/1976 | US3991343 Control circuit for progressively varying illumination intensity of lamps | | 11/02/1976 | US3989980 Variable intensity warning light | | 09/14/1976 | US3980921 Illuminating device for a microscope | | 08/17/1976 | US3975658 Mass of current inrush limiters | | 06/15/1976 | US3964040 Circuit for detecting burned-out lamp for a buoy lamp changer | | 06/08/1976 | US3962600 Ambient light responsive illumination brightness control circuit | | 05/25/1976 | US3958875 Apparatus for controlling slide projectors | | 02/10/1976 | US3938000 Lamp driver for telephone panel indicator lamps | | 01/20/1976 | US3934249 Border flashers |
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