Patents by Inventor Stork Wilhelm

Stork Wilhelm 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).

  • Structure arrangement, in particular for a security element
    Patent number: 6243202
    Abstract: A structural arrangement having optical diffraction qualities for use as a security element in a value bearing document, such structural arrangement having a plurality of surface regions having at least two subregions having identical relief structures which provide for an optical diffraction effect, the relief structures of adjacent subregions being displaced relative to each other by a fraction of the grating period.
    Type: Grant
    Filed: March 26, 1997
    Date of Patent: June 5, 2001
    Assignee: Leonhard Kurz GmbH & Co.
    Inventor: Stork Wilhelm