Patents Assigned to Photics Corporation
  • Patent number: 5972546
    Abstract: The application of Lippmann photographs as a unique security device on security documents, such as, e.g. identity cards, passports, credit cards is presented. The recording of such photographs requires a special type of photosensitive film layer in contact with a reflecting layer. Panchromatic photopolymer materials can be used and, after being recorded and processed, laminated to security documents. Lippmann photographs are almost impossible to copy and, certainly, cannot be copied by conventional photography or color copying machines.
    Type: Grant
    Filed: January 22, 1998
    Date of Patent: October 26, 1999
    Assignee: Photics Corporation
    Inventor: Hans I. Bjelkhagen