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Monday
In 1835, a U.S. patent was issued for a rotary washing machine to C. H. Farnham. A hand-turned crank rotated a perforated cylinder within a covered wooden shell. Clothes were put inside the cylinder through a hatch in the shell and a removeable panel in the cylinder. In 1848, the first U.S. patent for a surgical or dental operating-chair with adjustable elevation and tilt of the seat and back was issued to M.W. Hanchett. The chair included a footrest with adjustable elevation.