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All Patents in class 91/311
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	1,998,003	Apr. 16, 1935	L.F. Nenninger, C.W. Goodrich, H. Ernst	Hydraulic Feed Control
	2,574,751	Nov. 13, 1951	V.R. Noll	Engine for producing reciprocatory motion having substantially constant velocity except during reversals

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