ALEXANDRIA, Va., June 18 -- United States Patent no. 12,324,946, issued on June 10, was assigned to Zhejiang Zuojian Industry and Trade Co. Ltd. (Jinhua, China).
"Fast adjustable dumbbell" was invented by Zhaohong Yu (Yongkang, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A fast adjustable dumbbell is provided, which includes a handle provided with a first accommodation cavity; a plurality of dumbbell pieces, two groups of dumbbell pieces are respectively provided at outer sides of two ends of the handle, and the dumbbell pieces are provided with first through holes; a rotatable shaft including two independent half shafts, which are provided in the first accommodation cavity, the two half shafts can ...