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Patents for D. M. Ball
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	1,153,181	Sep. 07, 1915	G.F. Steedman	Air-drier
	1,162,262	Nov. 30, 1915	G.F. Steedman	Lubricating apparatus for compressors and similar machines

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