ALEXANDRIA, Va., May 26 -- United States Patent no. 12,641,271, issued on May 26, was assigned to The Nielsen Co. (US) LLC (New York).

"Apparatus and methods for watermarking using starting phase modulation" was invented by Alexander Topchy (New Port Richey, Fla.), Vladimir Kuznetsov (Ellicott City, Md.) and Jeremey M. Davis (New Port Richey, Fla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Methods, apparatus, systems and articles of manufacture are disclosed for watermarking using starting phase modulation. An example apparatus includes at least one memory, machine readable instructions, and processor circuitry to execute the machine readable instructions to at least access a media signal, access a water...