US Patent Issued to ZHONGCHAO SPECIAL SECURITY TECHNOLOGY, CHINA BANKNOTE PRINTING AND MINTING on March 25 for "Optical anti-counterfeiting element and manufacturing method thereof" (Chinese Inventors)

ALEXANDRIA, Va., March 26 -- United States Patent no. 12,257,857, issued on March 25, was assigned to ZHONGCHAO SPECIAL SECURITY TECHNOLOGY Co. LTD (Beijing) and CHINA BANKNOTE PRINTING AND MINTING CORP. (Beijing).

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

According to the abstract* released by the U.S. Patent & Trademark Office: "The disclose provides an optical anti-counterfeiting element and a manufacturing method of the optical anti-counterfeiting element, the optical anti-counterfeiting element includes: a substrate, the substrate has a first surface and a second surface which are opposite to each other; and an interference c...