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Patents for Christian D. Cowgill
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	315,388	Apr. 07, 1885	C.D. Cowgill	Plotter For Tinners' Use
	451,810	May 05, 1891	C.D. Cowgill	Bevel Attachment for Folding Rules

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