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US Patent: 256,739
Drill Chuck
Patentee: George Rehfuss (exact or similar names) - Philadelphia, PA USPTO Classifications: 279/49 Tool Categories: metalworking machines : drilling and boring : drill presses : drill press chucks Assignees: George Rehfuss - Philadelphia, PA Martin O. Rehfuss - Philadelphia, PA John George Rehfuss - Philadelphia, PA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Dec. 22, 1881 Granted: Apr. 18, 1882 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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