All Patents in class 187/270


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All Patents in class 187/270
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	43,451	Jul. 05, 1864	S. Van Emon, J. Reynolds, J.T. Bodley	Improvement in hoisting apparatus
	113,585	Apr. 11, 1871	T. Silver	Improvement in hoisting apparatus
	3,039,766	Jun. 19, 1962	C.N. Aronson	Geared elevation work positioner