Frederick McKinley Jones (May 17, 1893 ā February 21, 1961) was an African American inventor, entrepreneur, and engineer, a recipient of the National Medal of Technology, and an inductee of the National Inventors Hall of Fame. He pioneered mobile refrigeration technology, earning 61 patentsā40 of which were for refrigeration innovations. Jones also transformed the cinema industry by developing an improved sound system for movie projectors.















