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All Patents in class 194/246
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
372,441	Nov. 01, 1887	W.W. Roovers, P.G. Williams	Coin operated induction coil
RE10,949	Jul. 24, 1888	W.W. Roovers, P.G. Williams	Coin Operated Induction Coil

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