Patents for Darius Houghton


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Patents for Darius Houghton
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	272,139	Feb. 13, 1883	D. Houghton	Screw Cutting Tool
	292,227	Jan. 22, 1884	D. Houghton	Lathe Center Grinding Machine
	335,818	Feb. 09, 1886	D. Houghton	Wire-Cutting Machine