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US Patent: 313,546
Electric Dynamic Motor
Patentee: Frank J. Sprague (exact or similar names) - New York, NY USPTO Classifications: 361/237, 388/803, 388/924 Tool Categories: electrical devices : electric motors : DC motors Assignees: None Manufacturer: Sprague Electric Railway & Motor Co. - New York, NY Witnesses: Unknown	Patent Dates: Applied: Nov. 04, 1884 Granted: Mar. 10, 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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