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Patents for Irvin Drowns
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	1,375,785	Apr. 26, 1921	I. Drowns	Tool Holder
	1,751,078	Mar. 18, 1930	I. Drowns	Tool Holder
	1,820,056	Aug. 25, 1931	I. Drowns	Boring Tool Holder

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