Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Granville T. Woods, was an African-American inventor who held more than 60 patents. Most of his work was on trains and street cars. Woods also invented the Multiplex Telegraph, a device that sent messages between train stations and moving trains. Born in Columbus, Ohio, on April 23, 1856, Granville T. Woods dedicated his life to developing a variety of inventions relating to the railroad industry.