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US Patent: 1,698,685
Abrasive Wheel
Patentee: Henry K. Spencer (exact or similar names) - Winchester, Middlesex County, MA USPTO Classifications: 451/548 Tool Categories: metalworking machines : grinders : grinder wheels Assignees: Blanchard Machine Co. - Cambridge, Middlesex County, MA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Nov. 27, 1925 Granted: Jan. 08, 1929 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Blanchard Machine Co.

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