US Patent Issued to E Ink on Aug. 4 for "Method of applying a pattern, and security device for an article" (British Inventors)

ALEXANDRIA, Va., Aug. 5 -- United States Patent no. 12,697,834, issued on Aug. 4, was assigned to E Ink Corp. (Billerica, Mass.).

"Method of applying a pattern, and security device for an article" was invented by Graham Triggs-Ramm (Aberdeenshire, Great Britain) and Peiman Hosseini (Greater London, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "Methods of applying a pattern and security devices are disclosed. In one arrangement, a receiving member (10) having a layered structure (12) is provided. The layered structure (12) comprises a layer of phase change material (PCM, 2). The phase change material (PCM, 2) is thermally switchable between a plurality of stable states having different refracti...