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All Patents in class 318/37
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	200,032	Feb. 05, 1878	T.A. Edison	Synchronous Movements for Electric Telegraphs
	2,315,993	Apr. 06, 1943	C.S. Weyandt, E.J. Missien	Percussion tool

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