All Patents in class 346/34


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All Patents in class 346/34
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	1,042,385	Oct. 29, 1912	A.C. Bell	Signalling system
	1,046,182	Dec. 03, 1912	F. Hardinge	Signaling system
	1,690,517	Nov. 06, 1928	C.J. Brown, C.H. Wilson	Electrical controller and recorder
	2,748,665	Jun. 05, 1956	J.A. Sean	Machine Tool Positioning Mechanism