Patents for Samuel H. Keefer, estate of (deceased)


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Patents for Samuel H. Keefer, estate of (deceased)
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	1,156,484	Oct. 12, 1915	S.H. Keefer, estate of (deceased)	System of Motor Control
	RE14,540	Oct. 22, 1918	S.H. Keefer, estate of (deceased)	Planer and System of Motor Control Therefor