Wi Fi - It's the magical way millions connect to the internet. And this amazing technology started partly by a patent filed by a Hollywood actress. Hedy Lamarr was also an inventor. Against the backdrop of Hollywood, Lamarr along with composer George Anthiel, filed a patent for 'renewed control torpedo guidence system'.  It works by hopping radio signals from frequency to frequency, making them harder to locate, and making torpedoes almost unstoppable by the Nazi's. Lamarrs technology was the precursor of the technology used by GPS, Bluetooth and Wi Fi.