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Outside a house, U.S. President Calvin Coolidge is seen alongside famous inventor Thomas Edison, businessman Harvey Firestone, and famed industrialist Henry Ford. The men sign a wooden bucket, U.S.A., 1924. Calvin Coolidge was an American attorney and politician who served as the 30th president of the United States from 1923 to 1929. Born in Vermont, Coolidge was a Republican lawyer who climbed the ladder of Massachusetts politics, becoming the state's 48th governor.Thomas Alva Edison was an American inventor and businessman. He developed many devices in fields such as electric power generation, mass communication, sound recording, and motion pictures. Henry Ford was an American industrialist and business magnate. As the founder of the Ford Motor Company he is credited as a pioneer in making automobiles affordable for middle-class Americans through the system that came to be known as Fordism.Harvey Samuel Firestone Sr. was an American businessman, and the founder of the Firestone Tire and Rubber Company, one of the first global makers of automobile tires.