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Patents for Frank F. Spencer
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	524,952	Aug. 21, 1894	E.C. Phillips	Bit With Replaceable Wood-Screw Lead
	529,832	Nov. 27, 1894	E.C. Phillips	Bit With Replaceable Wood-Screw Lead

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