Hedy Lamarr's 1942 Patent Laid Foundation for Wi-Fi, Bluetooth

In 1942, actress Hedy Lamarr and composer George Antheil patented a frequency-hopping system to prevent torpedo jamming. The technique, using 88 frequencies like piano keys, later became essential for Wi-Fi, Bluetooth, and GPS. Lamarr was inducted into the National Inventors Hall of Fame in 2014, decades after her death.