ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,722,055, issued on Sept. 1.
"Adjustable racket" was invented by Yu Jen Chang (Taichung, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a novel adjustable racket, including a main frame, a core board and cover boards, wherein the main frame includes a handle and a border, the handle and the border are integrally formed, the main frame is provided with a mounting position, the core board is detachably arranged in the mounting position, and the cover boards are detachably arranged on the main frame. In this way, the core board and the cover boards can be replaced according to the needs of users. Different combinations of the core board ...