ALEXANDRIA, Va., Oct. 27 -- United States Patent no. 12,773,591, issued on Oct. 27, was assigned to YONGKANG YASHI INDUSTRY & TRADE Co. LTD. (Jinhua, China).
"Dumbbell" was invented by Chaohui Wang (Jinhua, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present patent provides a dumbbell. It is composed of a handle, a weight adjustment mechanism, and multiple sets of weight plates respectively set at both axial ends of the handle. The handle consists of a rotary drum and a retractable rod passing through the rotary drum. The weight adjustment mechanism contains a turnplate and a toothed disc coaxially arranged with the rotary drum. The turnplate is fixedly connected to the rotary drum. The dumbbell...