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Patents for David Hitchcock
Patents 1 - 3 of 3
Number	Date	Patentee	Title	Type
3,428X	Dec. 29, 1821	D. Hitchcock	Cast iron plough	plows
3,726X	Jul. 16, 1823	D. Hitchcock	Plough	plows
6,582X	Jun. 13, 1831	D. Hitchcock	Cornshelling machine	corn shellers

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