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US Patent: 2,504,578
Internal Gear Shaving Machine
Patentee: Harry Pelphrey (exact or similar names) - Detroit, Wayne County, MI USPTO Classifications: 409/33, 409/49 Tool Categories: metalworking machines : gear making machines Assignees: Michigan Tool Co. - Detroit, Wayne County, MI Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Dec. 19, 1945 Granted: Apr. 18, 1950 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Michigan Tool Co.

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