All Patents in class 138/147


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All Patents in class 138/147
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	112,018	Feb. 21, 1871	N.T. Coffin	Improvement in pumps
	149,263	Mar. 31, 1874	A.P. Stephens	Improvement in sheet-metal cement-lined pipes