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All Patents in class 198/666
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	2,138,576	Nov. 29, 1938	S.C. Gebert	Conveyor Feed Screw
	2,394,163	Feb. 05, 1946	S.C. Gebert	Sectional Screw Conveyer

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