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US Patent: 614,112
Disk Sharpening Device
Patentee: Thomas Knudtson (exact or similar names) - Malta, De Kalb County, IL USPTO Classifications: 172/437, 76/85, 82/128 Tool Categories: agricultural : sharpeners Assignees: Thomas Knudtson - Malta, De Kalb County, IL Theodore O. Berg - Lee, Lee County, IL Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jan. 11, 1897 Granted: Nov. 15, 1898 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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