ALEXANDRIA, Va., June 17 -- United States Patent no. 12,313,807, issued on May 27.
"Metal-detector means for locating the presence of metal objects" was invented by Alessandro Manneschi (Arezzo, Italy).
According to the abstract* released by the U.S. Patent & Trademark Office: "A system for detecting forbidden objects worn or carried by individuals includes a metal detector having at least three transducers arranged on either side of a passage, two of these transducers being positioned on the one same side of the passage and spaced apart longitudinally in the direction of travel through the passage, while the third transducer is positioned on the opposite side of the passage so that the three transducers are available in combination to pe...