All Patents in class 310/248


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All Patents in class 310/248
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	345,336	Jul. 13, 1886	E. Thomson	Commutator brush
	403,630	May 21, 1889	T.L. Wilson	Dynamo Electric Machine
	1,395,880	Nov. 01, 1921	D.W. Ward	Commutator Brush Reseating Tool