ALEXANDRIA, Va., July 28 -- United States Patent no. 12,691,702, issued on July 28, was assigned to Crane & Co. Inc (Dalton, Mass.).
"Micro-optic security device with multi-phase icon structure" was invented by Samuel M. Cape (Woodstock, Ga.), Benjamin E. Bleiman (Cumming, Ga.) and Jason Van Gumster (Woodstock, Ga.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An optical security device includes an array of focusing elements spaced at a first pitch along a first axis of repetition, wherein each focusing element of the array of focusing elements is associated with a focal footprint at a first focal depth. The optical security device further includes an icon layer disposed at the first focal depth relative to...