ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,509,742, issued on Dec. 30, was assigned to POSCO Co. LTD (Pohang-si, South Korea).
"Ultra-high strength steel sheet having excellent shear workability and method for manufacturing same" was invented by Sung-Il Kim (Gwangyang-si, South Korea) and Chan-Woo Bang (Gwangyang-si, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a steel sheet which is suitable to be used as the material of a part such as a friction plate for a vehicle automatic transmission. More specifically, the present invention relates an ultra-high strength steel sheet having excellent shear workability and a method for manufacturing same."
The...