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US Patent: 228,888
Regulating Electro-Magnetic Motors
Patentee: William W. Griscom (exact or similar names) - Philadelphia, PA USPTO Classifications: 310/68R, 310/77, 318/139, 318/372, 429/110 Tool Categories: electrical devices : electric motors : motor regulators Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Mar. 29, 1880 Granted: Jun. 15, 1880 Patent Pictures: 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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