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All Patents in class 55/300
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	531,517	Dec. 25, 1894	E.R. Draver	Dust-collector
	2,368,343	Jan. 30, 1945	E.E. Buskirk	Air purifier
	2,620,066	Dec. 02, 1952	H.L. Gilmore	Air cleaner

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