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All Patents in class 217/69
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	100,463	Mar. 01, 1870	C.M. Stratton, E.A. Stratton	Improvement in Spirit Level
	370,826	Oct. 04, 1887	C.M. Stratton, E.A. Stratton	Spirit Level Stock

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