All Patents in class 91/165


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All Patents in class 91/165
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	1,783,019	Nov. 25, 1930	A.M. Johnson	Honing machine
	1,954,442	Apr. 10, 1934	H. Ernst, A.H. Dall	Grinding Machine
	2,573,368	Oct. 30, 1951	E.Y. Seborg	Reciprocatory drive for machine tools
	3,464,315	Sep. 02, 1969	H.A. Weyer	Mechanical pneumatic servo control system for high-speed impact devices