Black Inventors in Technology: Granville T. Woods aka “Black Edison”

Granville T Woods - Electric Railway System

Granville T. Woods, also Known as “Black Edison,” registered nearly 60 patents in his lifetime, including a telephone transmitter, a trolley wheel and the multiplex telegraph. Woods’s most important invention was the multiplex telegraph, also known as the “induction telegraph,” in 1887. The device allowed people to communicate by voice over telegraph wires, which helped speed up important communications and prevent crucial errors such as train accidents. Woods defeated Thomas Edison’s lawsuit that challenged his patent, and turned down Edison’s offer to make him a partner. Thereafter, Woods was often known as “Black Edison.”

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