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US Patent: 323,181
Drill Chuck
Patentee: William Mason (exact or similar names) - New Haven, New Haven County, CT USPTO Classifications: 279/61, 279/902 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: Jun. 15, 1885 Granted: Jul. 28, 1885 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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