Method of verification of a sheet element, such as a banknote
Patent 4370057 Issued on January 25, 1983. Estimated Expiration Date: 
May 22, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 22, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorAssigneeApplicationNo. 06/152498 filed on 05/22/1980US Classes:356/71, DOCUMENT PATTERN ANALYSIS OR VERIFICATION283/58, Checks283/70, Identifying283/85, Utilizing electromagnetic radiation283/901CONCEALED DATAExaminersPrimary: McGraw, Vincent P.Attorney, Agent or FirmInternational ClassesB42D 15/10 (20060101)G07D 7/00 (20060101) G07D 7/04 (20060101) G07D 7/20 (20060101) B42D 15/00 (20060101) Foreign Application Priority Data1977-03-01 GBAbstractA sheet element, such as a banknote, has an incorporated authenticating device comprising a film having at least one edge which is provided with a non-rectilinear portion or portions shaped to provide coded information relating to the sheet element. The shape and proportions of said at least one edge of the shaped non-rectilinear portion or portions of said film are sensed to generate a signal dependant upon the shape and proportions of the edge of the film so as to derive the coded information. | |
