Security & Protection
| Thu 19 Mar 2026
Beijing, March 20 -- State Intellectual Property Office of China has published Shenyang Railway Signal patent application for Hidden Type Advancing Self-opening and Self-closing Lock. The invention was developed by Zhu Hejun, Li Qingshi, Qiu Jigang, Niu Di, Sun Ping, Gao Feng, Li Wei, Hu Junhe, Li Kun, Zhang Fuchun, Sun Yang, Ji..