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All Patents in class 470/187
Patents 1 - 5 of 5
Picture	Number	Date	Patentee	Title
	269,153	Dec. 12, 1882	F. Armstrong	Thread Cutting Die
	565,746	Aug. 11, 1896	J. Hartness	Screw Cutting Die
	1,076,188	Oct. 21, 1913	B. Borden	Thread-cutting tool
	1,988,046	Jan. 15, 1935	L. Nikoloff	Thread cutting die
	2,029,847	Feb. 04, 1936	W.W. Vosper	Threading and Facing Tool

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