Ajit Pai @AjitPai
Garrett Morgan (1877-1963) was the son of former slaves. At 18, he moved to Cleveland. After seeing a car accident there, he developed a traffic pole with 3 signals, including a “warning” position—an ancestor of the yellow light. OTD in 1923, @uspto granted him a patent for it. https://t.co/JnplbaVD4u — PolitiTweet.org