ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,553,137, issued on Feb. 17, was assigned to Walter AG (Tubingen, Germany).
"Coated cutting tool" was invented by Wolfgang Engelhart (Tubingen, Germany), Veit Schier (Tubingen, Germany) and Sven Majchrzak (Tubingen, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A coated cutting tool and a process for the production thereof is provided. The coated cutting tool consists of a substrate body of WC-Co based cemented carbide and a coating, the coating including a first (Ti,Al)N multilayer, a first gamma-aluminium oxide layer, and a set of alternating second (Ti,Al)N multilayers and second gamma-aluminium oxide layers."
The patent was filed on Dec. 17...