Hedy Lamarr's most important invention crafted the way for things we use every day like Wi-Fi, Bluetooth, GPS, and cell phones. It’s registered in the US under her name with the number 2,292,387, and it changed the course of history for technology. Also Read: ‘For Single People Only’: Man Attending Ed Sheeran Concert Tries Finding Love In Unique A Way LaMarr’s complex personality is a combination of her science and sensuality.