20150060551 | RETROREFLECTIVE ARTICLES HAVING A MACHINE-READABLE CODE - Retroreflective articles comprise a substrate and a bar code provided on the substrate. The bar code comprises at least one human-readable information which provides framing information and a machine-readable information which provides variable information. The human-readable information is visible under a first condition and invisible under a second condition, and the machine-readable information is invisible under the first condition and visible under the second condition. | 03-05-2015 |