ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,511,299, issued on Dec. 30, was assigned to Microsoft Technology Licensing LLC (Redmond, Wash.).

"Offline evaluation of ranking functions" was invented by Lihong Li (Redmond, Wash.), Jinyoung Kim (Bellevue, Wash.) and Imed Zitouni (Bellevue, Wash.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An example system includes a processor to receive production log data and pre-process the production log data to generate an exploration data set. The production log data includes continuous updates of a ranking function associated with different actions for a same query issued by a same user in different impressions. The processor can perform offline estimation o...