Black man invents and patents traffic signal
On this date in 1923, one of the first traffic signals in the United States was patented by an African American.
Garrett Morgan applied for and acquired a U.S. patent for this invention. The patent number was 1,475,024. Morgan's technology was later patented in Great Britain and Canada.
General Electric bought Morgan's patent for $40,000, and his traffic management device was used throughout North America until it was replaced by the red, yellow and green traffic signals currently used around the world.