Marcenia Lyle (Toni "Tomboy") Stone broke both gender and racial barriers by becoming the first female professional baseball player in the Negro Major League. During her career, she played with a variety of men's teams before making history when she joined the Indianapolis Clowns, a Negro Major League Team.

Nellie Stone Johnson was an African American union and civil rights leader whose career spanned the class-conscious politics of the 1930s and the liberal reforms of the Minnesota DFL Party. She believed unions and education were paths to economic security for African Americans, including women. Her self-reliant personality and pragmatic politics sustained her long and active life.

In 1939, Frederick McKinley Jones patented the world’s first successful refrigerated transportation system. At the time, he was working for the Minneapolis-based company U.S. Thermo Control. Two years later, he released an improved version, the Model C, which revolutionized the agriculture and military industries.