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All Patents in class 175/18
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	139,769	Jun. 10, 1873	W.A. Clark	Improvement in Ice-Augers
	629,539	Jul. 25, 1899	J. Bertram	Boring and excavating implement
	1,013,823	Jan. 02, 1912	E.H. Sheldon	Ice cutting or shaving device

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