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US Patent: 1,718,554
Hydraulic Grinder
Patentee: James Greensmith (exact or similar names) - Brookline, Norfolk County, MA USPTO Classifications: 451/146, 451/151, 451/20, 451/395 Tool Categories: metalworking machines : grinders : surface grinders Assignees: Boston Scale & Machine Co. - Boston, Middlesex County, MA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Apr. 19, 1920 Granted: Jun. 25, 1929 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Boston Scale & Machine Co.

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