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Ratchet Wrench Company (York Springs, PA) - building factory 10/1887, Chartered 5/7/1888. The 5/10/1889 edition of the New Oxford Item reports that the factory "commenced making wrenches on Monday" (5/6/1889).
John W. Day Patent #343,628 - Ratchet Wrench - Assigned to David M. Stewart - York Springs, PA.