ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,558,915, issued on Feb. 24, was assigned to VIAVI Solutions Inc. (Chandler, Ariz.).
"Security ink based security feature" was invented by Vladimir P. Raksha (Santa Rosa, Calif.) and Cornelis Jan Delst (Fairfax, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A security article may include a substrate. The security article may include a layer of security ink. The layer of security ink may include a set of color-shifting interference particles. The security article may include a layer of magnetic color-shifting ink. The layer of magnetic color-shifting ink may include a set of magnetically aligned magnetic particles. A color-shifting property of the...