Security & Protection
| Wed 26 Nov 2025
Beijing, Nov. 26 -- State Intellectual Property Office of China has awarded a patent to Qinghai Yanhu Yuanpin Chemical for High-pressure Safety Valve Checking Device. Wang Zhiguo, Chen Youjie, Liu Junqing, Shi Xueting, Yang Zhixin, Wang Wenyuan, Duan Zhengjun, Zhang Bin, Li Binwen, Guo Yong, Yu Wenchang, Zhao Min, Zhao Yajie and..