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Patents for David Sperry
Patents 1 - 3 of 3
First set of recordsLast set of records
1,730XMay 12, 1812D. SperryBoring hubs and felloes of wheelsdrilling and boring
4,735XApr. 18, 1827D. SperryBoring and tenoning spokes for wheelswheelwright
5,967XMay 19, 1830D. Sperry, S. FisherThrashing machinethreshers
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