ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,746,621, issued on Sept. 29, was assigned to Sintokogio Ltd. (Nagoya, Japan).
"Method for machining tool" was invented by Yuta Saito (Nagoya, Japan) and Yuji Kobayashi (Nagoya, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for machining a tool includes applying compressive residual stress to the tool by laser peening using a pulsed laser. The tool includes a base material and a coating layer that covers at least a portion of a surface of the base material. In the applying, the compressive residual stress is applied to the tool such that a difference in compressive residual stress at an interface between the base material and the coating...