ALEXANDRIA, Va., June 12 -- United States Patent no. 12,296,401, issued on May 13, was assigned to Honda Motor Co. Ltd. (Tokyo).
"Spot welding method" was invented by Hitoshi Saito (Tochigi, Japan), Shinya Watanabe (Tochigi, Japan) and Xihao Tan (Tochigi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "This spot welding method is a method for joining workpieces being a layered body of three or more metal sheets by supplying welding current. The welding current has a pulse-like waveform wherein a peak state in which the current reaches or is maintained to be within a set peak current range and a non-peak state in which the current is lowered from the peak current range to a set bottom current, and is the...