Patents by Inventor Robert W. Herring

Robert W. Herring has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Lamp circuit apparatus
    Patent number: 4527095
    Abstract: A lamp and lamp circuit apparatus are provided in which the lamp has a plurality of filaments operable one filament at a time and driven by a plurality of filament drivers. A filament failure detector circuit is operatively connected to one or more filament drivers for detecting the failure of the filament being driven. A circuit actuates a second filament in the multiple filament bulb when the filament failure detector detects failure of one filament, so that a lantern, and especially flashing lanterns, can have an extended lamp life.
    Type: Grant
    Filed: July 28, 1982
    Date of Patent: July 2, 1985
    Inventor: Robert W. Herring