US Patent Issued to PowerChina Northwest Engineering on Sept. 2 for "Right-angle turning method for small-diameter TBM exploration adit excavation" (Chinese Inventors)

ALEXANDRIA, Va., Sept. 3 -- United States Patent no. 12,404,770, issued on Sept. 2, was assigned to PowerChina Northwest Engineering Corporation Limited (Xi'an, China).

"Right-angle turning method for small-diameter TBM exploration adit excavation" was invented by Youlin Wang (Xi'an, China), Yongshun Liu (Xi'an, China), Junheng Cao (Xi'an, China), Jian Jiao (Xi'an, China), Shuwu Li (Xi'an, China), Xiaoliang He (Xi'an, China), Jian Bao (Xi'an, China), Yue Zhao (Xi'an, China), Zhongqiang Zhao (Xi'an, China), Xiaoxia Xu (Xi'an, China), Lei Feng (Xi'an, China), Nan Chen (Xi'an, China), Wei Liu (Xi'an, China) and Zhixiang Zhao (Xi'an, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention disc...