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All Patents in class 55/400
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	107,665	Sep. 27, 1870	W.S. Colwell	Improvement in blowers
	165,662	Jul. 20, 1875	J. Du Bois	Improvement in spark-arresters
	872,072	Nov. 26, 1907	F.J. Lyman	Spark Destroyer for Smoke Stacks

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