GENEVA, Feb. 15 -- CHINA SOUTHERN POWER GRID LIMITED LIABILITY COMPANY ULTRA-HIGH VOLTAGE TRANSMISSION COMPANY TIANSHENG BRIDGE BUREAU (No.58, South Ruijin Road, Jishanban, Xingyi City, Qiannan Buyi and Miao Autonomous PrefectureGuizhou 562400), 中国南方电网有限责任公司超高压输电公司天生桥局 (中国贵州省黔西南布依族苗族自治州兴义市桔山办瑞金南路58号) filed a patent application (PCT/CN2024/110560) for "ONLINE BROADBAND VOLTAGE MEASUREMENT APPARATUS...