All Patents in class 318/693


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All Patents in class 318/693
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	714,786	Dec. 02, 1902	M.W. Day	Controlling Electric Motors
	2,473,572	Jun. 21, 1949	E.A. Ruchty, N.D. Cooper	Magnetic Servo Operator