ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,386,649, issued on Aug. 12, was assigned to Nippon Telegraph and Telephone Corp. (Tokyo).

"Server maintenance control device, server maintenance system, server maintenance control method, and program" was invented by Shogo Saito (Musashino, Japan) and Naoki Takada (Musashino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A controller server includes an assignment unit that assigns devices connected to a server to virtual machines, a usage status management unit that records correspondence between the virtual machines and devices used by the virtual machines, a warning relation management unit that records types of warnings that may occur for each...