an early American pioneer and inventor. Some sources state that she was the first American woman to receive a patent, however others state that Mary Dixon Kies, in 1809, was the first. In 1793, Samuel Slater showed Hannah some very smooth yarn he had spun from long staple Surinam cotton. He intended to use it to produce cloth, however Hannah and her sister used a hand spinning wheel to spin it into thread; the resultant thread proved to be stronger than linen thread. The same year, Hannah Slater applied to the U.S. Patent Office for a patent for an invention - a new method of producing sewing thread from cotton. The patent was issued in the name of "Mrs Samuel Slater".
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Mary Dixon Kies
...woman to receive a patent, however others state that Hannah Slater was the first. Kies' technique proved valuable...
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