首页>
外国专利>
measure for that someone authenticates of arkmaterialegenstande such as banknotes, credit cards and other securities, passport for security personnel and legnende documents
measure for that someone authenticates of arkmaterialegenstande such as banknotes, credit cards and other securities, passport for security personnel and legnende documents
A 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.
展开▼