ALEXANDRIA, Va., Sept. 3 -- United States Patent no. 12,403,709, issued on Sept. 2, was assigned to HP INDIGO B.V. (Amstelveen, Netherlands).
"Scratch-off structure production" was invented by Yavin Atzmon (Ness Ziona, Israel) and Inna Tzomik (Ness Ziona, Israel).
According to the abstract* released by the U.S. Patent & Trademark Office: "In one example of the disclosure, a substantially transparent substrate is provided at a printer. A primer layer is applied upon a first surface of the substrate. A security ink layer that includes security information is applied upon the primer layer. An opaque background ink layer is applied upon the security ink layer. A corona treatment is applied to a second surface, located on an opposite side of t...