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US Patent: 104,584
Improvement in grinding ledger and fly-blades, planer-knives, etc.
Patentee:
Charles Hardy - Biddeford, ME

USPTO Classifications:
144/138, 451/124

Tool Categories:
woodworking machines : machine and tool cutters : cutter grinding

Assignees:
None

Manufacturer:
Hardy Machine Co. - Biddeford, ME

Witnesses:
William Franklin Seaver
Henry C. Houston
G. Porter Hardy
George W. Watson

Patent Dates:
Granted: Jun. 21, 1870

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Hardy Machine Co.
Description:
A no. 488 sharpener from Hardy Machine Co. carries this patent.

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