Patents by Inventor Ian Daniel Von Fellenberg

Ian Daniel Von Fellenberg 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).

  • Security document and verification method
    Patent number: 8256683
    Abstract: A security document, such as a banknote or a check, is provided with a perforation pattern (5) having holes (5a, 5b) with elongate cross section. When viewing the perforation pattern (5) from a direction that is non-perpendicular to the surface of the document, different holes will have different optical transmission, which can be verified by eye or electronically. Perforation patterns (5) of this type are hard to forge and easy to verify.
    Type: Grant
    Filed: July 25, 2002
    Date of Patent: September 4, 2012
    Assignee: Orell Fussli Sicherheitsdruck AG
    Inventors: Ian Daniel Von Fellenberg, Beat Roland Schertenleib