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| Sat 07 Mar 2026
Beijing, March 7 -- State Intellectual Property Office of China has released Qingdao Jimo Power Supply Company Of State Grid Shandong Electric Power Company patent application for Portable Signboard Frame and Using Method. This invention was developed by Yang Chonghe, Yong Wentao, Han Weijie, Xu Tingbin, Chen Guangyi, Xiu Lili, ..