Patents by Inventor Sean Doyle

Sean Doyle 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).

  • Electronic visual display system for simulating the motion of a clock pendulum
    Patent number: 4939709
    Abstract: A visual device for simulating the motion of a clock pendulum consisting of a series of light emitting diodes having the property of emitting two distinct colors and electronic logic arranged to activate sequentially the series in one color in one direction and in the other color in the opposite direction.
    Type: Grant
    Filed: June 15, 1989
    Date of Patent: July 3, 1990
    Inventor: Sean Doyle