ALEXANDRIA, Va., Sept. 24 -- United States Patent no. 12,740,631, issued on Sept. 22, was assigned to DARWIN PRECISIONS Corp. (Hsinchu County, Taiwan).
"Compound facial mask" was invented by Chi Ying Lu (Hsinchu County, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A compound facial mask includes a flexible body, a discharge pattern, and a microneedle portion. The discharge pattern is positioned on the surface of the flexible body. The discharge pattern includes two metals, and the two metals have different redox potentials. The microneedle portion is positioned on the surface of the flexible body, prepared from a material different from the discharge pattern and provided with a plurality of conducti...