All Patents in class 209/643


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All Patents in class 209/643
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	3,621,998	Nov. 23, 1971	V. Prochaska	Sheet grader
	3,918,586	Nov. 11, 1975	R.E. Tyler, P.M. Carter	Separating apparatus for flat pieces of different dimensions