Q1618In 1942 the actress Hedy Lamarr and composer George Antheil patented a way to stop radio-controlled torpedoes being jammed, by hopping the signal across frequencies. The same principle underlies wifi, GPS and Bluetooth.
Lamarr was billed as the most beautiful woman in the world and was bored by the parts she was given; she kept an inventing table at home. The frequency-hopping idea came with a mechanism synchronised by piano rolls — Antheil's contribution — and the US Navy filed the patent away unused. It expired before it earned either of them anything. Related techniques became fundamental to secure and shared wireless communication, and she was finally inducted into the National Inventors Hall of Fame in 2014, fourteen years after her death.







