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US Patent: 312,839
Centering Chuck
Patentee: Carlos W. Glover (exact or similar names) - Boston, Suffolk County, MA USPTO Classifications: 279/18 Tool Categories: metalworking machines : drilling and boring : drill presses : drill press chucks Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jul. 07, 1884 Granted: Feb. 24, 1885 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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