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US Patent: 146,064
Work Holding Devices
Patentee: Francis E. Hahn (exact or similar names) - Philadelphia, PA USPTO Classifications: 269/9 Tool Categories: metalworking machines : drilling and boring : drill presses : drill press accessories Assignees: Oscar C. Ferris - Philadelphia, PA Frederick B. Miles - Philadelphia, PA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Aug. 04, 1873 Granted: Dec. 30, 1873 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Bement, Miles & Co.

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