ALEXANDRIA, Va., July 30 -- United States Patent no. 12,370,398, issued on July 29, was assigned to Zhejiang Zuojian Industry and Trade Co. Ltd. (Jinhua, China).

"Dual axis adjustable dumbbell and dumbbell kit" was invented by Zhaohong Yu (Yongkang, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A dumbbell and a dumbbell kit are provided, the dumbbell includes a dumbbell body, dumbbell pieces accumulatively installed at two ends of the dumbbell body, and adjustment mechanisms respectively provided at two ends of the dumbbell body; the dumbbell body includes a grip rod, a center rod rotatably provided at a center position of the grip rod, and two sets of shell components respectively provided at two end...