Patents Assigned to Securicard Systems Limited
  • Indentification of articles using liquid crystal identity cards
    Patent number: 4536014
    Abstract: An identification article, especially an identity document, has a marked element (8), e.g. a photograph covered by a mask (2) which is normally opaque but which, upon application of a suitable electric field changes to an at least translucent state. Preferably the mask (2) complies a liquid crystal layer (16) sandwiched between two plates (5 and 7) of which one plate is at least translucent.
    Type: Grant
    Filed: August 24, 1982
    Date of Patent: August 20, 1985
    Assignee: Securicard Systems Limited
    Inventors: Lucy A. Boutaleb, Aboubekr Boutaleb, Tibor T. Kerekess