Actress and inventor Hedy LaMarr
Hedy LaMarr is most known for her roles in the 1940s Oscar-nominated films 'Algiers' and 'Sampson and Delilah."
But her technical mind is really her greatest legacy. She filed a patent in 1941 for frequency-hopping technology that became a precursor to the secure wi-fi, GPS, and Bluetooth used by billions worldwide.
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