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US Patent: 313,489
Commutator for dynamo electric machine
Patentee: Warren P. Freeman (exact or similar names) - New York, NY USPTO Classifications: 310/236 Tool Categories: electrical devices : electric motors : motor commutators Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Mar. 10, 1884 Granted: Mar. 10, 1885 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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