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US Patent: 260,314
Drill Chuck
Patentees: John A. Parks (exact or similar names) - New York, NY George V. Sheffield (exact or similar names) - New York, NY USPTO Classifications: 279/103, 279/7, 279/9.1, 403/350, 408/230, 408/231 Tool Categories: metalworking machines : drilling and boring : drill presses : drill press chucks Assignees: John A. Parks - New York, NY Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Sep. 29, 1881 Granted: Jun. 27, 1882 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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