ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,436,952, issued on Oct. 7, was assigned to The Nielsen Co. (US) LLC (New York).

"Method and system for estimating the cardinality of information" was invented by Michael Sheppard (Holland, Mich.), Edward Murphy (Montville, Conn.) and Jonathan Sullivan (Hurricane, Utah).

According to the abstract* released by the U.S. Patent & Trademark Office: "A computer-implemented method for efficiently estimating the number of unique elements in a collection of elements comprises generating, via hash logic, hash values associated with the elements. The hash values specify bit positions within an array of bits. Hash values output from the hash logic conform to a geometric distribution such that bit...