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Patents for Calvin Albertson
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	153,033	Jul. 14, 1874	J. Hobson, I.E. Hobson, C. Albertson	Improvement in machines for cutting locks in hoops
	153,996	Aug. 11, 1874	J. Hobson, I.E. Hobson, C. Albertson	Improvement in stave-machines
	179,390	Jul. 04, 1876	C. Albertson	Improvement in saws

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