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All Patents in class 74/448
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	482,864	Sep. 20, 1892	C.M. Conradson	Split wheel
	1,176,787	Mar. 28, 1916	G.L. Swabb	Gear
	2,707,884	May 10, 1955	J. Boisvert	Composite gear wheel

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