All Patents in class 451/50


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All Patents in class 451/50
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	525,441	Sep. 04, 1894	W. Brunner	Valve Reseating Machine
	2,377,982	Jun. 12, 1945	J. Decker, G.W. Binns, F.J. Theler	Grinding Machine and Method of Grinding
	2,438,239	Mar. 23, 1948	H.A. Toulmin, Jr.	Ball Grinding Machine