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All Patents in class 205/217
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	1,775,671	Sep. 16, 1930	T.E. Dunn	Electrolytic Method of Cleaning Metal
	1,867,527	Jul. 12, 1932	T.E. Dunn	Process for Anodic Removal of Surface Metal Film

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