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US Patent: 90,207
Improvement in saw-filing machines
Patentee: Albert Thompson (exact or similar names) - Ridgeway, PA USPTO Classifications: 76/31, 76/75 Tool Categories: metalworking machines : grinders : sharpening machines : saw sharpening machines Assignees: Albert Thompson - Ridgeway, PA Gilman T. Wheeler - Ridgeway, PA Manufacturer: Not known to have been produced Witnesses: Frank Blockley Alexander F. Roberts	Patent Dates: Granted: May 18, 1869 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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