ALEXANDRIA, Va., June 9 -- United States Patent no. 12,289,222, issued on April 29, was assigned to RAKUTEN MOBILE INC. (Tokyo).

"Cause inference regarding network trouble" was invented by Shinya Kita (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "To accurately infer a cause of a trouble occurring in a network. A network system acquires first information indicating a status of the network (S101), selects, from among a plurality of cause inference models provided for each type of a cause of a failure occurring in the network, each of the cause inference models being associated with a model selection condition, a cause inference model corresponding to the model selection condition satisfied by the acqui...