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US Patent: 1,783,121
Piston Ring Burr Removing Device
Patentee: Joseph H. Hoern (exact or similar names) - Saginaw, Saginaw County, MI USPTO Classifications: 29/33A, 409/299, 451/333 Tool Categories: metalworking machines : grinders : surface grinders Assignees: Wilcox-Rich Corp - Detroit, Wayne County, MI Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Nov. 23, 1929 Granted: Nov. 25, 1930 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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