All Patents in class 409/27


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All Patents in class 409/27
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	1,286,327	Dec. 03, 1918	H.A. Howarth	Gear Cutting Machine
	3,521,524	Jul. 21, 1970	R.A. Wassdorp, E.J. Hunkeler	Control Apparatus for Checking and Controlling Sequential Machine Operations