ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,413,646, issued on Sept. 9, was assigned to The Nielsen Co. (US) LLC (New York).

"Methods and apparatus to facilitate meter to meter matching for media identification" was invented by Sandeep Tapse (Oldsmar, Fla.) and Daniel Nelson (Tampa, Fla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Example methods, apparatus, systems and articles of manufacture are disclosed to facilitate meter to meter matching for media identification. Example apparatus disclosed herein include an unknown signature comparer, a stack counter, and a reference database updater. The unknown signature comparer is to select a candidate unknown signature segment meeting a threshold...