Patents by Inventor Frank Francken

Frank Francken 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).

  • Patent number: 4151892
    Abstract: The disclosure is of a sporting vehicle which is the combination of a frame mounted on at least three ground wheels two of which are steerable, a driving engine on the frame, a foot board tiltable about a transverse axis for controlling the speed of the engine and also tiltable about a longitudinal axis for steering the steerable wheels.
    Type: Grant
    Filed: April 4, 1977
    Date of Patent: May 1, 1979
    Inventor: Frank Francken