US Patent Issued to Authentix on July 29 for "Optical security device providing color switching or image switching effect" (Canadian, American Inventors)

ALEXANDRIA, Va., July 30 -- United States Patent no. 12,370,825, issued on July 29, was assigned to Authentix Inc. (Addison, Texas).

"Optical security device providing color switching or image switching effect" was invented by Milad Khoshnegar Shahrestani (Coquitlam, Canada), Clint K. Landrock (North Vancouver, Canada) and Ehsan Nahvi (Woodbury, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical security feature has pixels with faceted microstructures supporting nano-patterned optical filters. Each of the pixels includes a substrate and a nanostructure. The substrate is configured to emit light of at least a first wavelength and a second wavelength different than the first wavelength. The micros...