ALEXANDRIA, Va., July 15 -- United States Patent no. 12,666,179, issued on June 23, was assigned to The Nielsen Co. (US) LLC (New York).

"Audience monitoring systems and related methods" was invented by John T. Livoti (Clearwater, Fla.) and Stanley Wellington Woodruff (Palm Harbor, Fla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Audience monitoring systems and related methods are described herein. An example audience monitoring system includes a beacon to be disposed proximate a media presentation device. The beacon is to transmit a ping signal. The system also includes a portable metering device to be carried by a person. The portable metering device includes a microphone to receive an audio signal and ...