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US Patent: 147,297
Improvement in sharpening-machines
Patentee: Frank White (exact or similar names) - Cincinnati, OH USPTO Classifications: 451/369 Tool Categories: metalworking machines : grinders : sharpening machines Assignees: Post & Co. - Cincinnati, OH Manufacturer: Not known to have been produced Witnesses: Alexander Graydon John M. Fitzgerald	Patent Dates: Applied: Dec. 13, 1873 Granted: Feb. 10, 1874 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin
Description: "My invention relates to a device for holding planing-knives, &c., in the process of grinding..."

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