ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,752,328, issued on Oct. 6, was assigned to CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) Ltd. (Hong Kong).
"Flattening device" was invented by Xuyong Liu (Ningde, China), Jingjing Pu (Ningde, China), Hongwu Shang (Ningde, China), Shisong Li (Ningde, China) and Shengwu Zhang (Ningde, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A flattening device includes a main roller and a plurality of sleeves. The plurality of sleeves are sleeved on the main roller at intervals in an axial direction of the main roller. At least one of the sleeves is detachably connected to the main roller, so that positions of the sleeves in the axial direction of the main rolle...