ALEXANDRIA, Va., March 3 -- United States Patent no. 12,564,754, issued on March 3, was assigned to Shandong Aochuang fitness equipment Co. LTD (Dezhou, China).
"Plug-in weighted dumbbell" was invented by Chunyu Yang (Dezhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A plug-in weighted dumbbell relates to the technical field of fitness equipment. The plug-in weighted dumbbell includes a dumbbell bar and dumbbell plates, wherein radial plug-in grooves are formed on the dumbbell plates; the dumbbell bar includes a gripping part and adjusting parts, with the adjusting parts in threaded connection with the gripping part; a screwing part is provided at one end of each of the adjusting parts distal to t...