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All Patents in class 318/597
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	3,475,997	Nov. 04, 1969	J.A. Wohfeil	Method and Apparatus for Controlling Motions of a Drilling Cutter or the Like
	3,475,998	Nov. 04, 1969	C.J. Schneider, D.J. Steiner	Method and Apparatus for Controlling the Motion of a Reciprocable Tool Element or the Like

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