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US Patent: 2,633,678
Machine Tool and Method of Operation
Patentee: Herbert F. Smith (exact or similar names) - Springfield, Clark County, OH USPTO Classifications: 409/145, 451/19, 451/273, 451/28 Tool Categories: metalworking machines : metalworking machine mechanisms Assignees: Thompson Grinder Co. - Springfield, Clark County, OH Manufacturer: Thompson Grinder Co. - Springfield, Clark County, OH Witnesses: Unknown	Patent Dates: Applied: May 17, 1951 Granted: Apr. 07, 1953 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Thompson Grinder Co.
Description: This patent was listed on a Thompson Grinder Co. patent plate.

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