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US Patent: 723,399
Device for Filing Commutators for Dynamos or Motors
Patentee: Joseph B. MacIntosh (exact or similar names) - Lexington, Middlesex County, MA USPTO Classifications: 29/76.1, 451/418, 82/128 Tool Categories: specialty tools : commutator truing tools Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jul. 10, 1902 Granted: Mar. 24, 1903 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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