ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,390,877, issued on Aug. 19, was assigned to Tianjin Sunke Digital Control Technology Co. Ltd (Tianjin, China).

"Method, device, apparatus and storage media for welding quality detection" was invented by Eugene Feng (Tianjin, China), Yongzhi Zhang (Tianjin, China) and Lanmin Nie (Tianjin, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present application provides a method for weld quality detection comprising: applying a detection voltage to a weld during a cooling phase after the cut-off of the metal material welding current; detecting a detection current corresponding to the detection voltage applied to the weld; calculating continuous values...