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US Patent: 1,518,579
Valve-grinding tool
Patentee: Oscar D. Hapgood (exact or similar names) - Montague, MA USPTO Classifications: 451/117 Tool Categories: Assignees: Goodell-Pratt Co. - Greenfield, MA Manufacturer: Goodell-Pratt Co. - Greenfield, MA Witnesses: Unknown	Patent Dates: Applied: Aug. 25, 1922 Granted: Dec. 09, 1924 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Goodell-Pratt Co.

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