ALEXANDRIA, Va., March 17 -- United States Patent no. 12,577,796, issued on March 17, was assigned to Yihong Zhang (Jiangmen, China) and JIANGMEN RONGQUAN CONSTRUCTION TECHNOLOGY Co. LTD. (Jiangmen City, China).

"Single-opening wall crack intelligent grouting machine and construction method" was invented by Yihong Zhang (Jiangmen, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A single-opening wall crack intelligent grouting machine and a construction method are disclosed. The single-opening wall crack intelligent grouting machine includes a bottom plate, two lifting mechanisms are symmetrically fixed on an upper surface of the bottom plate, a connecting beam is fixed between the two lifting mechanisms...