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US Patent: 2,131,151
Grinding machines
Patentee: Herbert F. Smith (exact or similar names) - Springfield, OH USPTO Classifications: 451/363, 74/424.92, 74/458, 82/132 Tool Categories: metalworking machines : grinders : surface grinders Assignees: None Manufacturer: Thompson Grinder Co. - Springfield, OH Witnesses: Unknown	Patent Dates: Applied: Jun. 03, 1938 Granted: Sep. 27, 1938 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Thompson Grinder Co.
Description: This patent number was seen on a surface grinder from Thompson Grinder Co.

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