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US Patent: 315,179
Electric Dynamic Motor
Patentee: Frank J. Sp (exact or similar names) - New York, NY USPTO Classifications: 310/188, 310/189, 318/527 Tool Categories: electrical devices : electric motors Assignees: None Manufacturer: Not known to have been produced Witnesses: E. B. Rowland T. G. Greene, Jr. H. W. Seely	Patent Dates: Applied: Apr. 30, 1884 Granted: Apr. 07, 1885 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Sprague Electric Railway & Motor Co.

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