George Edward Alcorn Jr. (born March 22, 1940) is an American physicist, engineer, inventor, and professor. He taught at Howard University and the University of the District of Columbia, and worked primarily for IBM and NASA. He has over 30 inventions and 8 patents resulting in his induction into the National Inventors Hall of Fame in 2015.
Yvonne Y. Clark (born Georgianna Yvonne Young; April 13, 1929 – January 27, 2019) was a pioneer for African-American and women engineers. Also known as Y.Y., she was the first woman to earn a Bachelor of Science degree in mechanical engineering at Howard University, the first woman to earn a master's degree in Engineering Management from Vanderbilt University, and the first woman to serve as a faculty member in the College of Engineering and Technology at Tennessee State University, afterward becoming a professor emeritus.