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Patents for John R. McDonald
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	607,566	Jul. 19, 1898	C. Jacobson	Gas Engine
	2,300,047	Oct. 27, 1942	O.M. Jensen, F.T. Wruk, J.R. McDonald	Hydraulically controlled metal hack saw

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