ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,401,259, issued on Aug. 26, was assigned to AAC Microtech (Changzhou) Co. Ltd. (Jiangsu, China).

"Direct-drive system" was invented by Weiling Shi (Shenzhen, China), Yu Qin (Shenzhen, China), Min Chen (Shenzhen, China) and Xueyuan Zhu (Shenzhen, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A direct-drive system, including a base provided with a guide rail and a stator assembly; and at least one slide spaced from the base and fixed to the base by means of the guide rail. A mover assembly arranged opposite to the stator assembly is fixed to the at least one slide, and the mover assembly interacts with the stator assembly to drive the at least one ...