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

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