Patents by Inventor Frantisek Kolar

Frantisek Kolar 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).

  • Piston for combustion engines
    Patent number: 4185544
    Abstract: A piston comprising a lower part with a bore having a concave surface against which abuts the convex surface of a head of an expansion socket, the center of curvature of the concave surface lying on the axis of the bore and the head being formed in two halves with each half having a center of curvature lying offset from the axis of the bore.
    Type: Grant
    Filed: September 19, 1977
    Date of Patent: January 29, 1980
    Assignee: Mahle GmbH
    Inventor: Frantisek Kolar