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All Patents in class 91/244
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	417,653	Dec. 17, 1889	J.B. Stanwood	Steam-engine
	1,965,261	Jul. 03, 1934	C.L. Schulte	Grinding Machine
	3,464,315	Sep. 02, 1969	H.A. Weyer	Mechanical pneumatic servo control system for high-speed impact devices

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