All Patents in class 172/213


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All Patents in class 172/213
Patents 1 - 3 of 3
Number	Date	Patentee	Title	Type
5,517X	Jun. 11, 1829	R. Medley, B. Altenderfer, P. Altenderfer	Double Plough	plows
8,667X	Mar. 02, 1835	J. Tinkler	Plough	plows
AI194	Mar. 09, 1858	P. Klingle	Steam plow