ALEXANDRIA, Va., July 30 -- United States Patent no. 12,375,534, issued on July 29, was assigned to Apple Inc. (Cupertino, Calif.).

"Voice over internet protocol multimedia subsystem" was invented by Nitin Kuppelur (Bangalore, India), Anish George (Bangalore, India), Karthik Anantharaman (Cupertino, Calif.) and Deepak Dash (Bangalore, India).

According to the abstract* released by the U.S. Patent & Trademark Office: "This disclosure describes a communication system associated with a radio access technology (RAT). The communication system includes an Internet protocol (IP) multimedia subsystem (IMS) server, and one or more processors configured to perform operations. The operations include receiving, from a user equipment device (UE) campe...