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US Patent: 227,623
Electro-Magnetic Motor
Patentee: William W. Griscom (exact or similar names) - Philadelphia, PA USPTO Classifications: 310/224, 310/244, 310/75R Tool Categories: electrical devices : electric motors : DC motors Assignees: None Manufacturer: Electro-Dynamic Co. - Philadelphia, PA Witnesses: Alexander Patterson Harry Smith Henry Howson, Jr.	Patent Dates: Applied: Oct. 21, 1879 Granted: May 18, 1880 Patent Pictures: [ 1 | 2 | 3 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Electro-Dynamic Co.

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