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All Patents in class 408/58
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	114,953	May 16, 1871	R. Little	Improvement in boring-machines
	180,976	Aug. 08, 1876	P.H. Wilms	Improvement in boring-machines
	2,060,313	Nov. 10, 1936	A.C. Peterson, H.S. Hill	Chuck for paper drills
	2,412,937	Dec. 24, 1946	E.A. Allen	Boring head

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