Patents by Inventor Werner Verburg

Werner Verburg 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).

  • Tamper-proof document
    Patent number: 4455359
    Abstract: The tamper-proof document consists of a photographic material as information carrier comprising front- and back gelatine layers, the outer of the gelatine layers of which contain particles of a homo- or copolymer of an acrylic and/or methacrylic acid ester. The information carrier is laminated on one or both sides to a transparent foil by means of a hardenable adhesive. The document is remarkably safe against falsification.
    Type: Grant
    Filed: July 26, 1982
    Date of Patent: June 19, 1984
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Walter Patzold, Werner Verburg, Harald von Rintelen