Patents by Inventor William G. Copeland

William G. Copeland 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).

  • Vehicle headlight warning circuit
    Patent number: 4058793
    Abstract: A vehicle headlight warning circuit includes an electronic sounder connected between a vehicle ignition switch andthe headlight switch of the vehicle with the sounder emitting an audible tone in response to a voltage imbalance therebetween when the lights are on and the ignition is off. A mute switch is provided in a parallel path and is operative to activate a relay for overriding the warning circuit should it be desired to operate the vehicle lights when the vehicle ignition switch is turned off.
    Type: Grant
    Filed: May 24, 1976
    Date of Patent: November 15, 1977
    Inventor: William G. Copeland