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US Patent: 104,584
Improvement in grinding ledger and fly-blades, planer-knives, etc.
Patentee: Charles Hardy (exact or similar names) - 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: George W. Watson G. Porter Hardy Henry C. Houston William Franklin Seaver	Patent Dates: Granted: Jun. 21, 1870 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Hardy Machine Co.
Description: A no. 488 sharpener from Hardy Machine Co. carries this patent.

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