All Patents in class 451/37


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All Patents in class 451/37
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	744,340	Nov. 17, 1903	J.N. Heald	Grinding Attachment for Lathes
	1,989,792	Feb. 05, 1935	J.C. Drader	Automatic Machine Tool
	2,142,285	Jan. 03, 1939	H. Pelphrey	Hob and Method of Manufacture
	2,328,869	Sep. 07, 1943	L.A. Wilkie	Saw band and method of lubricating the same