Hedy Lamarr.
Hedy Lamarr was an Austrian and American inventor and film actress. During her film career, Lamarr co-invented the technology for spread spectrum and frequency hopping communications with composer George Antheil. This new technology became important to America's military during World War II because it was used in controlling torpedoes. Those inventions have more recently been incorporated into Wi-Fi, CDMA and Bluetooth technology, and led to her being inducted into the National Inventors Hall of Fame in 2014.