ALEXANDRIA, Va., April 15 -- United States Patent no. 12,601,339, issued on April 14, was assigned to UNIK WORLD INDUSTRIAL Co. LTD. (Tainan City, Taiwan).
"Air compressor" was invented by Wen San Chou (Tainan City, Taiwan) and Cheng Hsien Chou (Tainan City, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An air compressor includes a cylinder having a piston passage having rear and front ends, a piston including piston and shaft portions, a piston ring, and a driving unit. The piston portion is in the piston passage and has an annular groove. The shaft and piston portions are connected via the rear end. The piston ring is at the annular groove. First and second portions of the piston ring are at first ...