ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,397,584, issued on Aug. 26, was assigned to PEM (CHINA) Co. LTD. (Jiangsu, China).
"Roller device" was invented by Xiaoming Chen (Jiangsu, China), Zhiqiang Huang (Jiangsu, China), Wei Xing (Jiangsu, China) and Dapeng Duan (Jiangsu, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "This application relates to a roller device. The device comprises: a roller; and a roller axle, the roller axle comprises: an axle portion configured to mount the roller such that the roller is rotatable about the axle portion; and a riveting portion at a mounting end of the roller axle with respect to an axial direction of the roller axle, and extending from the mounting e...