All Patents in class 33/519


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All Patents in class 33/519
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	80,649	Aug. 04, 1868	B.F. Merrill	Improvement in Gauges
	2,494,152	Jan. 10, 1950	W.W. Ablett	Tool to Check Centrality and Alignment of Keyways in Shafts
	2,521,820	Sep. 12, 1950	L.B. Fuller, R.O. Beardsley	Optical Comparator for Testing Cams
	2,807,091	Sep. 24, 1957	F.E. Michelson	Keyway Checkers