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Patents for R. Denne
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	237,764	Feb. 15, 1881	E. Medden	Rotary pump
	238,603	Mar. 08, 1881	E. Medden	Rotary engine
	242,672	Jun. 07, 1881	E. Medden	Journal-box

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