November 20, 1923 – Invention of three position traffic light

The U.S. Patent Office granted Patent No. 1,475,074 to 46-year-old inventor Garrett Morgan on this day in 1923 for his three position traffic light. Morgan introduced the middle light to help ensure safer intersections, as previous signals had only stop and go lights. The first ever traffic light was installed in London in 1868. Morgan, the son of two former slaves, earned prosperity through his work as a newspaperman in Ohio and would eventually sell rights to his patent to General Electric for $40,000.┬áPic: Garrett Morgan – Public Domain

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