US Patent Issued to Henan Polytechnic University on June 30 for "Permeability enhancement device for coal-seam gas drainage" (Chinese Inventors)

ALEXANDRIA, Va., July 16 -- United States Patent no. 12,669,055, issued on June 30, was assigned to Henan Polytechnic University (Jiaozuo, China).

"Permeability enhancement device for coal-seam gas drainage" was invented by Jianping Wei (Jiaozuo, China), Yong Liu (Jiaozuo, China), Tiegang Zhang (Jiaozuo, China), Heng Yang (Jiaozuo, China), Hongtu Zhang (Jiaozuo, China), Xiangyu Xu (Jiaozuo, China), Boyang Zhang (Jiaozuo, China), Banghua Yao (Jiaozuo, China), Peiliang Ren (Jiaozuo, China), Mian Wang (Jiaozuo, China), Pan Chen (Jiaozuo, China), Man Wang (Jiaozuo, China), Yaocai Tang (Jiaozuo, China), Xiangyang Wang (Jiaozuo, China), Jinhua Li (Jiaozuo, China), Botao Li (Jiaozuo, China), Changjiang Chen (Jiaozuo, China), Huidong Zhang (Jiaozu...