ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,541,538, issued on Feb. 3, was assigned to NTT Inc. (Tokyo).
"Clustering apparatus, clustering method, and program" was invented by Ibuki Mishina (Tokyo), Dai Ikarashi (Tokyo), Koki Hamada (Tokyo) and Ryo Kikuchi (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a clustering apparatus capable of securely performing hierarchical clustering while concealing all of a calculation process and values in the middle. A clustering apparatus includes: a cluster ID update unit that combines two clusters closest to each other and updates a cluster ID of a cluster ID table in which a data ID and a cluster ID are associated with each other on a one-to-...