All Patents in class 100/198


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All Patents in class 100/198
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	1,404,490	Jan. 24, 1922	F.E. Stevenson	Combined Filter and Hydraulic Press
	1,755,353	Apr. 22, 1930	L.S. Hubbert	Filter Pot Press