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The Assembly Line
It was first fully adopted by Henry Ford in 1913 to produce the famous Ford Model. The moving line was perfected in the 1920's. -
First US Radio Station
America's first Radio Station, KDKA, was aired and issued with the first ever license on Oct. 27, 1920. -
Lie Detector
The lie detector, the modern polygraph system that sensed reactions that determined if a person was lying, was invented by John A. Larson. -
Traffic Signal
After seeing two vehicles crash into each other Garret Morgan invented the traffic signal. -
The Television
The first television was invented in 1925 by John Logie Baird. The first experimental television broadcast in the US. was in 1928. -
Jukebox
The first selective jukebox was introduced in 1927 by the Automated Musical Instrument Company.