US Patent Issued to SHIJIAZHUANG TIEDAO UNIVERSITY on April 29 for "Trenchless multi-stage pipe cleaning device and method combining artificial tornado and dagger-like mechanical sand" (Chinese Inventors)

ALEXANDRIA, Va., June 9 -- United States Patent no. 12,285,784, issued on April 29, was assigned to SHIJIAZHUANG TIEDAO UNIVERSITY (Shijiazhuang, China).

"Trenchless multi-stage pipe cleaning device and method combining artificial tornado and dagger-like mechanical sand" was invented by Jiwei Wen (Shijiazhuang, China), Pengshuai Zhang (Shijiazhuang, China), Wenjiang Li (Shijiazhuang, China), Xianmin Han (Shijiazhuang, China), Zhichun Liu (Shijiazhuang, China), Xingliang Sun (Shijiazhuang, China), Pengcheng Wang (Shijiazhuang, China), Weige Han (Shijiazhuang, China) and Lin Gao (Shijiazhuang, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A trenchless multi-stage pipe cleaning device and method combinin...