African-American Joyner, in 1928, invented a machine for giving permant waves to both "black" and "white" women.

African-American inventor Morgan endowed us with one of the great aids to civilization, the Green-yellow-red traffice light in 1915, after witnessing a collision at a crossroad.

Morgan also invented an improved gas mask for workers developing underground tunnels.

There is a Page on the Web devoted to Morgan.