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US Patent: 2,308,472
Valve seat grinding device
Patentee: John A. Smith, II (exact or similar names) - Cincinnati, OH USPTO Classifications: 384/537, 451/430, 451/548 Tool Categories: Assignees: United States Electrical Tool Co. - Cincinnati, OH Manufacturer: United States Electrical Tool Co. - Cincinnati, OH Witnesses: Unknown	Patent Dates: Applied: Feb. 24, 1941 Granted: Jan. 12, 1943 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for United States Electrical Tool Co.

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