Patents Assigned to Landquart
  • Patent number: 7108286
    Abstract: The present invention describes security paper and security items in general containing at least one security element having at least one photoluminescent segment characterized by a linearly polarized photoluminescence and/or a linearly polarized absorption. The present invention also describes a method of producing such security items as well as the use thereof.
    Type: Grant
    Filed: September 22, 1999
    Date of Patent: September 19, 2006
    Assignee: Landquart
    Inventors: Christoph Weder, Paul Smith