ALEXANDRIA, Va., Aug. 25 -- United States Patent no. 12,720,513, issued on Aug. 25, was assigned to STEELROCK TECHNOLOGIES LTD (London).
"Portable countermeasure system" was invented by Rupert Joseph English (London) and Christopher Hamer (London).
According to the abstract* released by the U.S. Patent & Trademark Office: "A portable countermeasure system for disabling or disrupting short-range wireless communication networks, comprising a signal generator for generating a first signal and a second signal, each in the Wi-Fi frequency bands, a signal multiplexer for multiplexing the first and second signals outputted from the signal generator into a combined signal, and a circularly polarised antenna for transmitting the combined signal."...