ALEXANDRIA, Va., June 9 -- United States Patent no. 12,651,764, issued on June 9, was assigned to CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) Ltd. (Hong Kong).

"Winding and unwinding device and battery production system" was invented by Yu Liu (Ningde, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "This application provides a winding and unwinding device and a battery production system. The winding and unwinding device includes a turret, a driver, and a magnetic powder clutch. The turret includes a rotation shaft and at least one winding shaft, the rotation shaft being parallel to the winding shaft. A drive shaft of the magnetic powder clutch is connected to the driver and a driven shaft of the magneti...