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Granville Woods invented the railroad telegraph which allowed trains send and receive messages and helped avoid crashes.
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Thomas Edison filed with the Patents office describing his ideas to bring motion to pictures. Thomas Edison created are movie projector which helped bring motion pictures to the public.
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Charles F. Kettering invented the automobile slef-starter that allowed drivers to sit inside their car and start the motor with a key instead of having to turn a crank located on the outside of the car.
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Garrett Morgan invented the traffic light after seeing an accident and realizing the need for a better way to control traffic.
