Telecom
| Wed 04 Feb 2026
Beijing, Feb. 4 -- Tianjin Huayu Hengtong Photoelectric Tech Co Ltd has submitted a patent application for Photoelectric Coupling Emergency Telephone Control Method, System, Equipment and Medium. This invention was developed by Zhao Yunhai, Yu Dongxu, Xu Jianqiu, Fan Na, Cui Haitao, Guo Honghai, Wang Zhiguang, Ma Chengxiao, Zhao..