ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,559,809, issued on Feb. 24, was assigned to POSCO Co. LTD (Pohang-si, South Korea).

"Wire rod for concrete reinforcing steel fiber, steel fiber, and manufacturing method therefor" was invented by Yo-sep Yang (Seoul, South Korea), Jaeseung Lee (Pohang-si, South Korea), Je-wook Jang (Pohang-si, South Korea) and Manjae Lee (Pohang-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a wire rod for a concrete reinforcing steel fiber, a steel fiber, and a manufacturing method therefor. According to one disclosed embodiment of a wire rod for a concrete reinforcing steel fiber, the wire rod comprises, by weight, C: 0.01 to 0.04%, Si: 0.07...