ALEXANDRIA, Va., Aug. 25 -- United States Patent no. 12,716,869, issued on Aug. 25, was assigned to CHINA INSTITUTE OF WATER RESOURCES AND HYDROPOWER RESEARCH (Beijing).

"Method and device of identifying and locating PCCP broken wire signal" was invented by Feng Shang (Beijing), Yue Zhang (Beijing), Xuhui Yu (Beijing) and Haonan Wei (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a method and a device of identifying and locating a PCCP broken wire signal, the device comprises a distributed optical cable adheres on a pipe, a high frequency subsystem connected with two cores of the cable, a low frequency subsystem connected with the third core of the cable, and a contro...