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CA Patent: CA-15,491
Improvements on automatic saw-sharpeners
Patentee: William Hawkins Halladay (exact or similar names) - Chicago, IL USPTO Classifications: Tool Categories: metalworking machines : grinders : sharpening machines : saw sharpening machines Assignees: None Manufacturer: William H. Halladay Mfg. Co. - Chicago, IL Halladay, Litchfield & Co. - Chicago, IL Witnesses: Unknown	Patent Dates: Granted: Sep. 19, 1882 Patent Pictures: CIPO Data Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Halladay, Litchfield & Co.

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