Answered

Which of these African-American inventors developed a shoe-manufacturing machine that significantly cut shoe prices in the United States?



Answer :

heavenwaterfall
Jan Matzeliger invented the shoe-producing machine that could finish from 100-650 more shoes (each day) than by hand. This made shoe production a factory (rather than hand-made) product. 
lindasamuels

Jan E. Matzeliger developed a shoe-manufacturing machine that significantly cut shoe prices in the United States.