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US Patent: 3,305,974
Grinding Machine
Patentee: John C. Wilson (exact or similar names) - Springfield, Clark County, OH USPTO Classifications: 125/11.03, 451/26, 451/72 Tool Categories: Assignees: Thompson Grinder Co. - Springfield, Clark County, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Oct. 01, 1964 Granted: Feb. 28, 1967 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Thompson Grinder Co.

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