Known for appearing alongside Hollywood stars of the era like Clark Gable, Spencer Tracy, and Judy Garland, Lamarr is also credited, along with composer George Antheil, with inventing frequency hopping, which serves as the basis for today’s spread-spectrum communication technologies. The technology was presented to the U.S. Navy soon after being invented, but was not implemented in the U.S. until 1962, after the patent had expired.