Elijah, The Real McCoy

Elijah McCoy (May 2, 1844–October 10, 1929) was a Black American inventor who received more than 50 patents for his inventions during his lifetime. His most famous invention was a cup that feeds lubricating oil to machine bearings through a small tube. Machinists and engineers who wanted genuine McCoy lubricators might have used the expression "the real McCoy"—a term meaning "the real deal" or "the genuine article."