10 Everyday Items Invented by Celebrities That You Never Knew Existed!

1. Hedy Lamarr – Frequency-Hopping Spread Spectrum

The glamorous 1930s and 40s actress Hedy Lamarr co-invented a frequency-hopping spread spectrum technique with composer George Antheil. This groundbreaking technology, developed during World War II, laid the foundation for modern Wi-Fi, Bluetooth, and GPS.