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US Patent: 459,572
Commutator Turning Device
Patentee: Arthur Knox Bonta (exact or similar names) - Hoboken, Hudson County, NJ USPTO Classifications: 29/27B, 451/418, 82/128, 82/137 Tool Categories: specialty tools : commutator truing tools Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Oct. 16, 1890 Granted: Sep. 15, 1891 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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