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US Patent: 462,879
Drill Chuck
Patentee: Charles T. Pratt (exact or similar names) - Clayville, Oneida County, NY USPTO Classifications: 279/68 Tool Categories: metalworking machines : drilling and boring : drill presses : drill press chucks Assignees: Pratt Chuck Co. - Clayville, Oneida County, NY Manufacturer: Pratt Chuck Co. - Frankfort, Herkimer County, NY Witnesses: Unknown	Patent Dates: Applied: Mar. 02, 1891 Granted: Nov. 10, 1891 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Pratt Chuck Co.

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