Who was the last black scientist/inventor to make a major discovery?

Question

Who was the last black scientist/inventor to make a major discovery?

Answer 1

charles Richard Drew invented the blood bank in 1940. He should have won the Nobel Prize for Medicine and Physiology

Answer 2

How 1800's of you.  There are tons of black scientists making discoveries all the time.  I could look one up, but by the time you read it, it will be obsolete.