All Patents in class 409/16


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All Patents in class 409/16
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	2,330,167	Sep. 21, 1943	W.F. Zimmermann	Thermally Insulated Hobbing Machine
	2,330,168	Sep. 21, 1943	W.F. Zimmermann	Hobbing Machine