ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,384,189, issued on Aug. 12, was assigned to DLR Newco Ltd. (Basingstoke, Great Britain).
"Method of forming a security device" was invented by Brian Holmes (Fleet, Great Britain), Michael Fickes (Basingstoke, Great Britain) and Michael Levin (Basingstoke, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of forming a security device includes: a holographic image layer, diffusion element, and barrier layer. A region of the barrier layer includes a heat-transformable material. The method further includes selectively applying heat at a plurality of positions within the region of the barrier layer, in accordance with a predetermined patt...