ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,427,802, issued on Sept. 30, was assigned to Zhongchao Special Security Technology Co. Ltd (Beijing) and China Banknote Printing and Minting Corp. (Beijing).
"Optical anti-counterfeiting element and optical anti-counterfeiting product" was invented by Weiwei Zhang (Beijing), Kai Sun (Beijing) and Chunhua Hu (Beijing).
According to the abstract* released by the U.S. Patent & Trademark Office: "The disclosure provides an optical anti-counterfeiting element (1) and an optical anti-counterfeiting product (0), which belong to the technical field of optical anti-counterfeiting. The optical anti-counterfeiting element includes: a substrate (2) having a first surface (21) and a second surfa...