Patents by Inventor Fritz Kirstein

Fritz Kirstein 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).

  • Forgery-proof information carrier
    Patent number: 4568824
    Abstract: A forgery-proof information carrier comprises an insert (1) having a passport photo (7), data about the owner and other security features, and plastics films (5, 6) which are joined in an undetachable manner to the insert (1), and is distinguished in that a metal mask (2) is provided as an edge protection at least in the region of the edges of the information carrier. In a further development to increase the security against forgeries, the metal mask (2) may be inwardly provided with irregular edges (3) or with openings (4).
    Type: Grant
    Filed: March 3, 1983
    Date of Patent: February 4, 1986
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Raimo Gareis, Fritz Kirstein
  • Forgery-proof information carrier
    Patent number: 4536015
    Abstract: An identity card for information is provided by the imprint of security figures on the card or the exposure of features in the data carrier insert. The data carrier may be a photographic silver halide layer of a recording material. In addition to the photograph and data about the owner there is provided a film covering the information carrier with externally applied imprints. The shapes of these external imprints are identical to the security features on the insert and are positioned exactly above said features.
    Type: Grant
    Filed: March 3, 1983
    Date of Patent: August 20, 1985
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventor: Fritz Kirstein
  • Security filament as protection against fraud
    Patent number: 4371196
    Abstract: The invention relates to a security filament to protect against forgery of bank notes, securities, permit cards, identity cards and passports, whereby the safety thread has a cross-sectional shape by which it can be identified optically and is provided with structural features on its surface which extend invariably over the length of the thread.
    Type: Grant
    Filed: March 27, 1981
    Date of Patent: February 1, 1983
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Walter von Kempski, Fritz Kirstein