All Patents in class 73/85


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All Patents in class 73/85
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	1,571,310	Feb. 02, 1926	C.H. Wilson	Penetrator for testing penetration hardness
	1,768,639	Jul. 01, 1930	W.F. Shore, A.F. Shore	Gauge
	2,361,441	Oct. 31, 1944	C.H. Wilson	Hardness testing indenter
	2,362,941	Nov. 14, 1944	D.F. Sklar	Penetrator chuck retainer