Patents for Robert E. McKelvey


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Patents for Robert E. McKelvey
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	2,473,963	Jun. 21, 1949	R.E. McKelvey	Speed selection unit
	2,506,514	May 02, 1950	R.E. McKelvey	Reduction drive for drill presses and the like