All Patents in class 307/13


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All Patents in class 307/13
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	390,413	Oct. 02, 1888	N. Tesla	System of Electrical Distribution
	404,567	Jun. 04, 1889	O.B. Shallenberger	System of generators for alternating electric currents
	1,072,422	Sep. 09, 1913	J. Burke	Electric controlling apparatus
	3,448,294	Jun. 03, 1969	R. Zechlin, R.M. Henry	Multiphase Power Switching Circuit