All Patents in class 172/213


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All Patents in class 172/213
Patents 1 - 2 of 2
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