ALEXANDRIA, Va., Sept. 3 -- United States Patent no. 12,404,788, issued on Sept. 2, was assigned to COPLUS INC. (Tainan, Taiwan).
"Oil tank cap" was invented by Po-Hua Wu (Tainan, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An oil tank cap adapted to be removably engaged with an oil tank having an oil storing space. The oil tank cap includes a cap body, an air seal, and an air valve. The cap body includes an outer casing, and a cap base being plastic and one-piece, and defining an accommodation space with the outer casing. The cap base has an annular seat portion that has at least one exhaust hole, a tube portion, a separation portion having at least one ventilation hole. The air seal has a protrus...