Who was granville woods?

Answer 1

Some people think of Granville T. Woods as the "Black Edison"-- like Thomas Edison, he was an inventor who was years ahead of his time. He was born and raised in Ohio, and despite having only a limited education, he apprenticed himself to men who helped him develop his considerable engineering skills. In his life, he got more than 60 patents, including a signaling system that helped make railroad communication more effective and prevented accidents. I enclose a link to a good biography of his life.