Patents by Inventor Fritz von Lansdorff

Fritz von Lansdorff 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).

  • Set of shaped stones and shaped stone for paving ground areas with wide gaps therebetween
    Patent number: 5360285
    Abstract: A set of shaped stones for paving ground areas with wide gaps between the shaped stones is provided which comprises first and second shaped stones, with the second shaped stones having a smaller plan view area than the first shaped stones. A plurality of integral spacing projections are provided on the periphery of only one of the first and second shaped stones for defining the wide gaps in the shaped stone pavement.
    Type: Grant
    Filed: May 4, 1992
    Date of Patent: November 1, 1994
    Assignee: F. von Langsdorff Licensing Limited
    Inventors: Gunther Barth, Fritz von Lansdorff, Harald von Langsdorff