ALEXANDRIA, Va., July 9 -- United States Patent no. 12,350,951, issued on July 8, was assigned to ZHONGCHAO SPECIAL SECURITY TECHNOLOGY Co. LTD (Beijing) and CHINA BANKNOTE PRINTING AND MINTING CORP (Beijing).

"Optical anti-counterfeiting element and anti-counterfeiting product" was invented by Baoli Zhang (Beijing), Kai Sun (Beijing), Weiwei Zhang (Beijing) and Jun Zhu (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are an optical anti-counterfeiting element and an anti-counterfeiting product. The optical anti-counterfeiting element comprises: a substrate, which comprises a first surface and second surface that are opposite one another, and a surface micro-structure layer that is formed on ...