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US Patent: 455,689
Drill-chuck
Patentee: Charles T. Pratt (exact or similar names) - Clayville, NY USPTO Classifications: 279/67, 33/30.2 Tool Categories: metalworking machines : drilling and boring : drill presses : drill press chucks woodworking machines : wood drilling and boring : drill presses : drill press chucks Assignees: Pratt Chuck Co. - Frankfort, NY Manufacturer: Pratt Chuck Co. - Frankfort, NY Witnesses: John Dempsey W. J. Millard	Patent Dates: Applied: Apr. 01, 1891 Granted: Jul. 07, 1891 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Pratt Chuck Co.

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