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US Patent: 372,441
Coin operated induction coil
Patentees: Percy G. Williams (exact or similar names) - Brooklyn, NY Wilfred W. Roovers (exact or similar names) - Brooklyn, NY USPTO Classifications: 194/246, 607/65 Tool Categories: Assignees: None Manufacturer: Not known to have been produced Witnesses: D. H. Driscoll M. J. Roach	Patent Dates: Applied: May 06, 1887 Granted: Nov. 01, 1887 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Russ Allen

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