All Patents in class 73/162


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All Patents in class 73/162
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	1,732,730	Oct. 22, 1929	R.W. Porter	Method and Apparatus for Measuring and Comparing Gears and the Like
	1,916,118	Jun. 27, 1933	W.G. Hoelscher, A.E. Robinson	Lapping Machine
	2,085,850	Jul. 06, 1937	W.H. Bock, J.C. Drader	Gear Speeder