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All Patents in class 174/117F
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	1,150,022	Aug. 17, 1915	A.B. Field	Coil-wedge
	3,696,412	Oct. 03, 1972	R.I. Swanson	Method and Means for Indicating Tension

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