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US Patent: 475,560
Plug-Cutter
Patentee: Ernst C. Heydenreich (exact or similar names) - Mount Clemens, MI USPTO Classifications: 408/205, 408/224, 408/26, 408/714 Tool Categories: woodworking tools : hand drills : drill bits : hollow bits Assignees: None Manufacturer: Not known to have been produced Witnesses: James Whittemore M. B. O'Dogherty	Patent Dates: Applied: Dec. 23, 1891 Granted: May 24, 1892 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin (dm)

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