ALEXANDRIA, Va., June 17 -- United States Patent no. 12,312,983, issued on May 27, 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 is adapted to be removably engaged with an oil inlet of an oil tank. The oil tank cap includes a cap body that is one-piece, that is plastic, and that includes a cap portion adapted to be disposed outside the oil inlet, and a plug portion extending from the cap portion along a central axis of the cap body and adapted to extend into the oil inlet. The plug portion has a surrounding surface that surrounds the central axis of the cap body, a base surface, an accommod...