ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,425,516, issued on Sept. 23, was assigned to MICROSOFT TECHNOLOGY LICENSING LLC (Redmond, Wash.).

"Indication of tone support via format specifier" was invented by Anish Kavia (Slough, Great Britain), Salem Amin Al-Damluji (Chorleywood, Great Britain) and Ranabahu Mudiyanselage Janaka Chandimal Ranabahu (Enfield, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "A device receives a Session Initiation Protocol (SIP) message containing a Session Description Protocol (SDP) offer for a communications session from a first endpoint. The SDP offer includes a first parameter indicating whether the communications session will include media encoding T...