Granville T. Woods (April 23, 1856 – January 30, 1910)was born in Columbus, Ohio, on April 23, 1856, to free African-Americans. He held various engineering and industrial jobs before establishing a company to develop electrical apparatus. Known as "Black Edison," he registered nearly 60 patents in his lifetime, including a telephone transmitter, a trolley wheel and the multiplex telegraph (over which he defeated a lawsuit by Thomas Edison). Woods died in 1910.