ALEXANDRIA, Va., June 9 -- United States Patent no. 12,287,445, issued on April 29, was assigned to CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING (Beijing).

"Coal rock interface directional detection device and method based on elastic waves" was invented by Yifan Zeng (Beijing), Xianhui Wang (Beijing), Qiang Wu (Beijing), Chunsheng Liu (Beijing), Fei Chen (Beijing), Jia Zhao (Beijing) and Zhuangjie Cui (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "A coal rock interface directional detection device based on elastic waves includes: a probe body including an elastic wave receiving device and an elastic wave excitation device spaced set at the top; a protective tube with one end connected to the a...