ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,449,458, issued on Oct. 21, was assigned to BRITISH TELECOMMUNICATIONS PLC (London).
"Electromagnetic field detector" was invented by Fraser Burton (London), Marco Menchetti (London) and Liam Bussey (London).
According to the abstract* released by the U.S. Patent & Trademark Office: "This invention provides a method of detecting an electromagnetic field, and a device for 5 performing said method, the method comprising the steps of: transmitting a probe signal at a probe frequency in a first probe signal path and a second probe signal path to an optical receiver, wherein the first probe signal path passes through a transmission medium and the probe frequency is set to excite electrons...