ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,397,188, issued on Aug. 26, was assigned to Hao's fitness equipment (Shanghai) Co. Ltd. TRADING LTD. (Shanghai).
"Weight-adjustable dumbbell" was invented by Lihui Wang (Shanghai).
According to the abstract* released by the U.S. Patent & Trademark Office: "A weight-adjustable dumbbell includes: a handle, two ends of the handle respectively provided with a fixing plate; a plurality of dumbbell plates, respectively arranged sequentially along the fixing plate and movably connected to each other; a pair of first sliding slots, disposed on each of the plurality of dumbbell plates, and penetrating through each of the plurality of dumbbell plates; a pair of second sliding slots, disposed o...