ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,508,463, issued on Dec. 30, was assigned to OHFG TECHNOLOGIES(SHANGHAI) Co. LTD (Shanghai).

"Dumbbell capable of adjusting weight rapidly, and dumbbell assembly" was invented by Ping Liu (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a dumbbell capable of adjusting weight rapidly, including a dumbbell rod assembly and dumbbell plates. Hitching assemblies are arranged at two ends of the dumbbell rod; a first baffle is arranged at one end of each of the hitching assemblies; a concave inserting-connection port is formed at the top of each of the dumbbell plates; the dumbbell plates are hitched to the hitching assemblies; the dumbbell ...