All Patents in class 409/38


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