ALEXANDRIA, Va., June 25 -- United States Patent no. 12,339,980, issued on June 24, was assigned to NIPPON TELEGRAPH AND TELEPHONE Corp. (Tokyo).

"Data replacement apparatus, data replacement method, and program" was invented by Satoshi Hasegawa (Musashino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A data replacement apparatus that can perform microaggregation of large-scale data at high speed using only a primary storage device of a small capacity. The data replacement apparatus includes an attribute value set retrieval unit that retrieves a grouped attribute value set into a primary storage device when a size of the grouped attribute value set is equal to or smaller than a predefined size and re...