All Patents in class 173/44


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All Patents in class 173/44
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	1,491,523	Apr. 22, 1924	G.H. Ekstrom	Adjustable drilling and balancing tool
	2,148,348	Feb. 21, 1939	W.F. Groene, H.J. Siekmann	Turret lathe
	2,706,892	Apr. 26, 1955	A.H. Dall, H. Fritschi	Tracer Control Circuit for Pattern Controlled Machines
	2,972,868	Feb. 28, 1961	B. Sassen	Machine tool slide control