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US Patent: 257,612
Method of Revivifying Abrading-Surfaces
Patentee: Joseph Renshaw (exact or similar names) - Hartford, CT USPTO Classifications: 125/1, 125/11.03, 451/59, 51/293 Tool Categories: metalworking machines : grinders : sharpening machines Assignees: None Manufacturer: Not known to have been produced Witnesses: Theo. G. Ellis Charles L. Burdett	Patent Dates: Applied: Aug. 22, 1881 Granted: May 09, 1882 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin (dm)
Description: Flat metal plate charged with loose emery or corundum granules for the purpose of flattening and renewing oilstones.

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