I shouldn’t have said ham radio ... more like coded signals radio
Forbes article, 2/28/2018, regarding: ... documentary on her life called Bombshell: The Hedy Lamarr Story. The film chronicles the patent that LaMarr filed for frequency-hopping technology in 1941 that became a precursor to the secure wi-fi, GPS and Bluetooth now used by billions of people around the world.
I. Did. Not Know That.
Thanks!