Answer
Three women were added to the National Inventors Hall of Fame before Stephanie Kwolek: Hedy Lamarr, Marie Curie, and Alice H. Parker. Lamarr, a Hollywood actress, is known for her work on frequency hopping spread spectrum, a technology used in Wi-Fi, GPS, and Bluetooth. Curie, a physicist and chemist, is known for her work on radioactivity and the discovery of polonium and radium.