ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,537,560, issued on Jan. 27, was assigned to Metrotech Corp. (Santa Clara, Calif.).
"Data encoding in a low frequency magnetic field" was invented by Stephen John Petherick (Exeter, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of data transmission includes transmitting a magnetic signal that is modulated with the bit stream, the magnetic signal having a nominal frequency and being formed of a high frequency and a low frequency, the nominal frequency being the average frequency of the magnetic signal. The bit stream is modulated onto the magnetic signal by encoding the bit stream into the magnetic signal, where each bit in the bit...