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All Patents in class 172/704
Patents 1 - 3 of 3
Number	Date	Patentee	Title	Type
8,089X	Mar. 17, 1834	R.B. Chenoweth	Self-sharpening plough	plows
85	Nov. 23, 1836	B. Woodcock	Plow	plows
3,052	Apr. 15, 1843	J. Gallatin	Improvement in Plows	plows

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