African-American Achievements
African-American Achievements How many do you know? Mary Van Brittan Brown 1st Home Security System Elijah McCoy Automative lubricators that improved the safety and efficiency of train engines; invented the …
African-American Achievements How many do you know? Mary Van Brittan Brown 1st Home Security System Elijah McCoy Automative lubricators that improved the safety and efficiency of train engines; invented the …