Method of verification of a sheet element, such as a banknote
US4370057A · kind A · utility
11Cited by
16References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 22, 1980 |
| Grant date | Jan 25, 1983 |
| Priority date | — |
| Expiry date | May 22, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S283/904
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.