ALEXANDRIA, Va., June 5 -- United States Patent no. 12,277,569, issued on April 15, was assigned to The Nielsen Co. (US) LLC (New York).

"Methods and apparatus for estimating total unique audiences" was invented by Michael Sheppard (Holland, Mich.), Jonathan Sullivan (Hurricane, Utah), Peter Lipa (Tucson, Ariz.), Matthew B. Reid (Alameda, Calif.), Peter C. Doe (Ridgewood, N.J.) and Peng Fei Yi (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed examples determine a unique audience exposed to media while reducing memory resources of a computing device. Example instructions program programmable circuitry to log a plurality of impressions corresponding to media accessed at client devices; generat...