Patents by Inventor Paul H. Keuver

Paul H. Keuver 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).

  • Ellipsograph
    Patent number: 4048724
    Abstract: An ellipsograph characterized by a pair of rectilinearly slideable members disposed in 90.degree. crossing relationship and adjustable radii crankpins for moving same, forming a pair of Scotch yokes, and a stylus carrying member slideably engaging both members in the locus of their crossing, adapted to resolve the rectilinear movements of the members into elliptical movement.
    Type: Grant
    Filed: April 12, 1976
    Date of Patent: September 20, 1977
    Inventor: Paul H. Keuver