I did not know this.
What you may not realize, however, is that Lamarr was more than just a starlet- she was also a successful inventor who pioneered, among other things, spread spectrum communications technologies:
Perhaps it was those restrictions that made Hedy an inventor, or perhaps it was just her intellectual curiosity. Either way, Hedy was inventing things, big and small, right up until she died. There were many utilitarian, small inventions, like a box of tissues that had its own pocket to store used tissues in. And then there was the showstopper: With musician George Antheil, she patented the 'secret communication system' in 1942. The frequency hopping, spread-spectrum invention allowed its users to manipulate radio frequencies. The earliest one used a piano roll to guide the hopping between frequencies. In World War II, it was used to keep torpedoes from being detected or manipulated by enemy forces.
Decades later on, the wide spectrum aspect of the invention formed the basis for the communications boom. Cell phones, Wi-Fi, the modern world as we know it, it all flowed from the original patent that Hedy came up with to fight Nazis.
Pretty neat, eh?