Bluetooth, and secure Wi-Fi. Despite the significance of her invention, Lamarr’s contributions were overlooked, with most of her fame attributed to her acting career. Lise Meitner, an Austrian ...

Hedy Lamarr, though better known for her beauty and career as a movie star, was a prolific inventor. She devised the frequency-hopping radio technology that WiFi, Bluetooth and GPS are based on.

Small devices like light sensors or network components could soon harvest power from background Wi-Fi and Bluetooth signals — ...