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All Patents in class 477/111
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	1,527,247	Feb. 24, 1925	C. Bouillon	Electric Motor Driven Change Speed Device
	1,563,546	Dec. 01, 1925	C. Bouillon	Electric Motor Driven Change Speed Device
	2,215,627	Sep. 24, 1940	J.M. Walter	Machine tool drive

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