ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,721,710, issued on Sept. 1.
"Toothbrush head" was invented by Hanbao Hu (Gaozhou City, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A toothbrush head, including a toothbrush round head, a large body, and an eccentric inner shaft. The toothbrush round head is provided with bristles on one side and a first connecting structure on the other side. The large body is provided with a mounting groove. The mounting groove is provided therein with a mounting base. The mounting base is provided with a second connecting structure that cooperates with the first connecting structure. The sleeve head is provided with a rotating hole corresponding to a shape of...