Patents by Inventor Peter Landis

Peter Landis 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).

  • Disc tumbler cylinder lock
    Patent number: 4644768
    Abstract: A disc tumbler cylinder lock wherein the cylinder has transverse slots for frame-like tumblers having enlarged portions normally extending into the case for the cylinder under the action of springs to thus prevent rotation of the cylinder except on insertion of a proper key which retracts the tumblers into the cylinder. The enlarged portions are wedges which form part of U-shaped or Z-shaped sections of the frames.
    Type: Grant
    Filed: July 13, 1984
    Date of Patent: February 24, 1987
    Assignee: Uniswitch AG.
    Inventors: Claude Nowak, Peter Landis