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  • Contributor is exactly "Butler, Benjamin F. (Benjamin Franklin), 1795-1858"

U.S. patent for machine for washing clothes, 1836 June 11

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A patent for Amory Davidson’s invention, a machine for washing clothes. Signed by the President of the United States, Andrew Jackson; the Attorney General of the United States, B. F. Butler; and the Secretary of State, John Forsythe.