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US Patent: 144,522
Improvement in saw-filing machines
Patentee: Joseph J. Engelman (exact or similar names) - Chillicothe, MO USPTO Classifications: 76/31, 76/36 Tool Categories: metalworking machines : grinders : sharpening machines : saw sharpening machines Assignees: None Manufacturer: Not known to have been produced Witnesses: H. C. Ireland S. McWilliams	Patent Dates: Applied: Jun. 10, 1873 Granted: Nov. 11, 1873 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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