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All Patents in class 451/905
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	272,480	Feb. 20, 1883	H.A. Rowland	Apparatus for Grinding Screws
	1,486,337	Mar. 11, 1924	W.E. Hoke	Machine for Making Gauges and Other Articles

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