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US Patent: 375,821
Grinding Machine
Patentees: Edwin R. Hyde (exact or similar names) - Springfield, Hampden County, MA Arthur Vallentine (exact or similar names) - Springfield, Hampden County, MA USPTO Classifications: 451/450, 451/451, 451/455 Tool Categories: metalworking machines : grinding machines Assignees: None Manufacturer: Springfield Glue & Emery Wheel Co. - Springfield, Hampden County, MA Witnesses: Unknown	Patent Dates: Applied: Dec. 13, 1886 Granted: Jan. 03, 1888 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Springfield Glue & Emery Wheel Co.

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