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Patents for George P. Butler
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	970,789	Sep. 20, 1910	G.P. Butler	Expansible Bit
	1,025,109	Apr. 30, 1912	G.P. Butler	Auger-Bit
	1,379,332	May 24, 1921	G.P. Butler	Expansion-bit
	1,391,242	Sep. 20, 1921	G.P. Butler	Process For Making Hand Tools

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