ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,537,513, issued on Jan. 27, was assigned to Sirius XM Radio Inc. (New York).

"Universal automatic frequency control for multi-channel receivers" was invented by Carl Scarpa (Plainsboro, N.J.) and Robert Joseph Topper (Hatboro, Pa.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Systems and methods for performing automatic frequency control are provided. Instead of relying on individual frequency tuners for each channel of a multi-channel receiver system, the present subject matter uses a single frequency tuner for receiving each channel of the multi-channel receiver system. A locked demodulator may be designated as a reference demodulator and frequency o...