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Patents for Gertrude K. Smith
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	1,175,496	Mar. 14, 1916	O. Zerk	Lubricating-bolt
	1,218,749	Mar. 13, 1917	W.L. Deming	Projectographoscope
	1,265,861	May 14, 1918	O. Zerk	Grease Cup

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