Patents by Inventor Walter E. Stiles

Walter E. Stiles 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).

  • Oval compass
    Patent number: 4148144
    Abstract: An ellipse drawing instrument employing a drawing arm, and a pair of members adapted to be connected to the drawing arm at two spaced points on the drawing arm, one of the members being constrained to move along a first path and the other of said members being constrained to move along a second path crossing the first path so that in use, as the members reciprocate along their respective paths, a point of the arm describes an elliptical path.The paths are linear and perpendicular to each other.
    Type: Grant
    Filed: May 4, 1978
    Date of Patent: April 10, 1979
    Assignee: Ron L. Norman
    Inventor: Walter E. Stiles