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Patents for Roy G. Kirby
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	2,641,874	Jun. 16, 1953	R.G. Kirby	Grinding Machine
	2,641,875	Jun. 16, 1953	J. Decker, J.M. Morgan, Jr., R.G. Kirby	Grinding Wheel Speed Regulator

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