Invention Grant
US07798413B2 Covert variable information on ID documents and methods of making same 有权
关于ID文件的隐藏变量信息及其制作方法

Covert variable information on ID documents and methods of making same
Abstract:
In one embodiment, a method for manufacturing an identification document is provided. The method includes: providing a substrate constructed and arranged to receive printing thereon; printing a first variable indicium on the substrate, where the first variable indicium is not visible to the human eye in ambient light but is visible to the human eye when viewed using a first type of light; and printing a second variable indicium on the substrate, the second variable indicium being visible when viewed using ambient light. Other methods, systems and documents are provided as well.
Information query
Patent Agency Ranking
0/0