Tools and Machinery
| Wed 11 Nov 2026
Beijing, Nov. 11 -- State Intellectual Property Office of China has awarded a patent to Yunnan Copper's Southwest Copper Industry Branch for Efficient Silencing Device. Wang Liyun, Zhao Junfeng, Liu Yunkai, Du Hui, Zuo Weiqiang, Duan Shichang, Yang Chunhua, Zhang Yanping, Mu Rong, Li Zhaoqian, Li Wei, Nong Shengxiang and Wang Li..