Granville T. Woods

Info courtesy of Wikipedia

Granville Tailer Woods (April 23, 1856 – January 30, 1910) was an African-American inventor who held more than 50 patents.  He is also the first American of African ancestry to be a mechanical and electrical engineer after the Civil War.  Self-taught, he concentrated most of his work on trains and streetcars.  One of his notable inventions was the Multiplex Telegraph, a device that sent messages between train stations and moving trains.  His work assured a safer and better public transportation system for the cities of the United States.

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