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US Patent: 434,489
Electric Power System
Patentee: Elihu Thomson (exact or similar names) - Lynn, Essex County, MA USPTO Classifications: 307/48, 307/69, 307/9.1, 307/90, 318/105 Tool Categories: electrical devices : electric distribution systems Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Oct. 09, 1889 Granted: Aug. 19, 1890 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Thomson-Houston Electric Co.

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