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US Patent: 375,821
Grinding Machine
Patentees:
Edwin R. Hyde - Springfield, Hampden County, MA
Arthur Vallentine - 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 pdf tiff
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"Vintage Machinery" entry for Springfield Glue & Emery Wheel Co.

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