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Patents for Robert W. Ellingham
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	1,445,875	Feb. 20, 1923	R.W. Ellingham, C.E. Van Norman	Grinding machine
	1,515,568	Nov. 11, 1924	R.W. Ellingham, G.W. Fleming	Grinding machine

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