ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,491,592, issued on Dec. 9, was assigned to KEDE NUMERICAL CONTROL Co. LTD. (Liaoning, China).

"Linkage swing head structure" was invented by Hu Chen (Liaoning, China), Xin Deng (Liaoning, China), Hongtao Tang (Liaoning, China), Haibo Zhang (Liaoning, China), Yapeng Li (Liaoning, China), Cuijuan Guo (Liaoning, China), Changlin Du (Liaoning, China), Zhihong Wei (Liaoning, China), Hongwei Sun (Liaoning, China), Guoshuai Zhang (Liaoning, China), Xiangyuan Kong (Liaoning, China), Gang Xu (Liaoning, China), Dawei Wang (Liaoning, China), Dapeng Dong (Liaoning, China), Meng Lin (Liaoning, China), Pei Liu (Liaoning, China), Yanqing Bai (Liaoning, China), Feng Wang (Liaoning, China), Yinghua Li ...