ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,491,574, issued on Dec. 9, was assigned to LINCOLN GLOBAL INC. (Santa Fe Springs, Calif.).
"TIG welding system" was invented by Matthew A. Weeks (Walloon, Australia), Bryan O'Neil (Double Oak, Texas), Christopher J. Williams (Norham, Great Britain) and Dale A. Johannesen (Narangba, Australia).
According to the abstract* released by the U.S. Patent & Trademark Office: "A gas tungsten arc welding torch includes a handle and a nozzle located distal of the handle and having a central bore. First and second tungsten electrodes are located partially within the central bore of the nozzle. The torch includes at least one filler wire channel that terminates radially inward of the first tungste...