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US Patent: 142,694
Improvement in boring-mills
Patentee: Francis E. Hahn (exact or similar names) - Philadelphia, PA USPTO Classifications: 408/69, 82/124 Tool Categories: metalworking machines : drilling and boring : vertical boring mills Assignees: Frederick B. Miles - Philadelphia, PA Oscar C. Ferris - Philadelphia, PA Manufacturer: Ferris & Miles - Philadelphia, PA Witnesses: Hubert Howson William A. Steel	Patent Dates: Applied: Aug. 04, 1873 Granted: Sep. 09, 1873 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Ferris & Miles

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