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Patents for R. P. Duffie
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	976,131	Nov. 15, 1910	S. McClellan	Chain Breast Ratchet Drill
	1,004,173	Sep. 26, 1911	J. Kline, J. Joss	Combination Rule, Bevel and Marking Gage

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