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US Patent: 2,391,375
Spindle shaft with intermediate ball bearing
Patentee: John Clifford Wilson (exact or similar names) - Springfield, OH USPTO Classifications: 451/361 Tool Categories: metalworking machines : metalworking machine mechanisms : metalworking machine bearings metalworking machines : grinders Assignees: Thompson Grinder Co. - Springfield, OH Manufacturer: Thompson Grinder Co. - Springfield, OH Witnesses: Unknown	Patent Dates: Applied: Oct. 20, 1943 Granted: Dec. 18, 1945 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Thompson Grinder Co.

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