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US Patent: 2,331,442
Plugging Switch
Patentee: Winthrop Trible (exact or similar names) - Cincinnati, Hamilton County, OH USPTO Classifications: 200/80R, 310/105, 318/373 Tool Categories: electrical devices : electric switches Assignees: Cincinnati Milling Machine Co. - Cincinnati, Hamilton County, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Dec. 15, 1941 Granted: Oct. 12, 1943 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Cincinnati Milling Machine Co.

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