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US Patent: 223,507
Machinery for Grinding Cocks
Patentee:
Joseph L. Hayden (exact or similar names) - Cambridgeport, Middlesex County, MA

USPTO Classifications:
451/116

Tool Categories:
metalworking machines : grinders : valve cock grinders

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Dec. 04, 1879
Granted: Jan. 13, 1880

Patent Pictures:
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