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November 20, 1923 - Garrett Morgan patents three position traffic light
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Who invented Traffic Light?
This Day In History: Garrett Morgan Patents The Traffic Signal
Black History Month: Garrett Morgan Invented The Three-Light Traffic
8 Images Who Invented The Traffic Light And Description - Alqu Blog
November 20, 1923 - Garrett Morgan patents three position traffic light
African American Who Invented The Traffic Light | Americanwarmoms.org