Security & Protection
| Sat 27 Jun 2026
Beijing, June 27 -- Qinhuangdao Tianqin Equipment Manufacturing has sought patent for Quick Locking Structure with Self-locking Function. This invention was developed by Shi Caoyang, Chen Xiumei, Zhao Weinan, Li Liyong, Zhang Jianli, Yu Hongsheng, Zhao Fei, Zhao Zidong, Hu Ming, Zhou Jie and Li Xin.
The patent application num..