ALEXANDRIA, Va., April 2 -- United States Patent no. 12,263,530, issued on April 1, was assigned to SUMITOMO ELECTRIC INDUSTRIES LTD. (Osaka, Japan).
"Cutting tool" was invented by Haruyo Fukui (Osaka, Japan), Nozomi Tsukihara (Osaka, Japan) and Toshihiro Tabata (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A cutting tool, including: a base; and a coating disposed on the base, wherein the coating includes a first layer, the first layer is composed of an alternate layer in which a first unit layer and a second unit layer are alternately stacked, the first unit layer has a hexagonal crystal structure, the first unit layer is composed of W(C1-aNa)x, a represents 0.3 or more and 0.8 or less, x rep...