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Patents for Square Hole Auger Co.
Patents 1 - 5 of 5
Picture	Number	Date	Patentee	Title
	307,065	Oct. 21, 1884	J. Oppenheimer	Mortising machine
	CA-21,971	Jul. 02, 1885	J. Oppenheimer	Mortising machine
	RE10,655	Oct. 27, 1885	J. Oppenheimer	Mortising-machine
	339,195	Apr. 06, 1886	J.C. Lake, A.E. Lake	Hand-crank chain mortising machine for timbers
	377,199	Jan. 31, 1888	R. Hughes, A.E. Lake, J.C. Lake	Square-hole auger

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