All Patents in class 409/38


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All Patents in class 409/38
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	333,488	Dec. 29, 1885	A. Swasey	Process of Cutting Teeth of Gear Wheels
	1,798,059	Mar. 24, 1931	M.F. Hill, H. Bilgram	Machine for making rotors