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All Patents in class 205/219
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	1,775,671	Sep. 16, 1930	T.E. Dunn	Electrolytic Method of Cleaning Metal
	1,898,765	Feb. 21, 1933	T.E. Dunn	Electrocleaning Process
	1,954,473	Apr. 10, 1934	T.E. Dunn	Electrochemical Process for Removing Scale and Oxide from the Surface of Stainless Steel

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