ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,730,137, issued on Sept. 8, was assigned to The Nielsen Co. (US) LLC (New York).

"Methods and apparatus to determine an operational status of a device" was invented by Bostjan Valencic (Koper, Slovenia) and Igor Sotosek (Portoroz, Slovenia).

According to the abstract* released by the U.S. Patent & Trademark Office: "Methods, apparatus, systems and tangible computer readable storage media are disclosed to determine an operational status of a device. Disclosed example apparatus include memory and processor circuitry to execute computer readable instructions to at least measure with a first sensor, a first magnetic field in at least three dimensions, the first magnetic field including a...