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Henry Ford invented the engine and created an increase in jobs. -
Although previous traffic lights were used Garret Morgan invented the first electric automatic light signal. -
Benjamin Holt first invented a crawling tracter which lead to the invention of a bulldozer which increased production. -
Stephen Poplawski invented the first electric blender to mix with a blade at the base. Which is now a common household item. -
Philo Taylor Farnsworth created the first electric TV. Which quickly replaced the mechanical one.