US Patent Issued to KOENIG & BAUER on Feb. 18 for "Security document including a transparent window formed in the substrate thereof" (Swiss, Dutch Inventors)

ALEXANDRIA, Va., Feb. 19 -- United States Patent no. 12,227,021, issued on Feb. 18, was assigned to KOENIG & BAUER AG (Wurzburg, Germany).

"Security document including a transparent window formed in the substrate thereof" was invented by Arnaud Crassous (La Tour-de-Peilz, Switzerland), Robert Stewart (La Tour-de-Peilz, Switzerland) and Robert Stierman (Alphen aan den Rijn, Netherlands).

According to the abstract* released by the U.S. Patent & Trademark Office: "Examples include a security document having a substrate with a transparent window. In the region of the transparent window, a micro-optical structure including microlenses is arranged on one side of the substrate and a first print image is arranged on the other side of the substrat...