ALEXANDRIA, Va., June 17 -- United States Patent no. 12,311,451, issued on May 27, was assigned to NIPPON STEEL Corp. (Tokyo).
"Cutting method and cut article" was invented by Takashi Yasutomi (Tokyo) and Akinobu Kobayashi (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "There is provided a cutting method for cutting a workpiece using a cutting tool comprising a die and a punch, including: arranging the workpiece between the die and the punch, and in a state in which a wedge-shaped first cutting part of the die and a wedge-shaped second cutting part of the punch are opposed, pushing the punch relatively to the die side to cut the workpiece; wherein: a front end angle Theta1 of the first cutting part and...