All Patents in class 451/250


	Home\| FAQ	Search:Advanced\|Person\|Company\| Type\|Class	Login


Quick search:	Patent number:	Patent Date:

All Patents in class 451/250
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	209,782	Nov. 12, 1878	J. Swan	Improvement in the Manufacture of Auger-Bits
	2,374,258	Apr. 24, 1945	G. Davenport	Infeed Control for Worm Gear Hobbing Machines
	2,981,038	Apr. 25, 1961	E.V. Flanders	Method of Grinding Helical Forms