Patents by Inventor Siegfried Eikemeier

Siegfried Eikemeier 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).

  • Tamperproof document and a process for producing the same
    Patent number: 4456667
    Abstract: The tamperproof document consists of a photographic material as information carrier which is laminated on one or both sides with a transparent foil. The foil is attached to the surface of the information carrier by a layer of adhesive containing poly-1,2-alkyleneimine. The document is eminently saft against falsification.
    Type: Grant
    Filed: July 26, 1982
    Date of Patent: June 26, 1984
    Assignee: Agfa-Gavaert Aktiengesellschaft
    Inventors: Richarda Bochow, Helmut Bergmann, Siegfried Eikemeier