ALEXANDRIA, Va., March 26 -- United States Patent no. 12,257,646, issued on March 25, was assigned to LG Energy Solution Ltd. (Seoul, South Korea).

"Horn and welding device" was invented by Jung Su Park (Daejeon, South Korea), Chang Bum Ahn (Daejeon, South Korea) and Il Hwan Park (Daejon, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "A horn includes a plurality of protrusion formation parts, each of which has a plurality of protrusions that protrude from a welding surface and are arranged in a line in at least one row, the plurality of protrusion formation parts respectively configured to form pattern formation parts on an outermost electrode tab of electrode tabs of a secondary battery, and a p...