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All Patents in class 173/148
Patents 1 - 6 of 6
Picture	Number	Date	Patentee	Title
	6,399	Apr. 24, 1849	C. Foss	Machine for making grindstones
	230,611	Aug. 03, 1880	J.C. Butterfield	Stamp-mill
	359,019	Mar. 08, 1887	J.C. Hyndman	Rock Drill
	1,272,345	Jul. 09, 1918	J. Beaudry	Drilling Machine
	2,002,480	May 21, 1935	K.F. Gallimore	Drive for Machine for Tool Elements
	3,149,507	Sep. 22, 1964	E.P. Bullard, IV	Machine Tool

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