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US Patent: 2,584,499
Apparatus for precision bore grinding
Patentee: Roger S. Pyne (exact or similar names) - Longmeadow, MA USPTO Classifications: 451/22, 451/227 Tool Categories: metalworking machines : grinders Assignees: Van Norman Co. - Springfield, MA Manufacturer: Van Norman Co. - Springfield, MA Witnesses: Unknown	Patent Dates: Applied: Aug. 02, 1948 Granted: Feb. 05, 1952 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Van Norman Machine Tool Co.
Description: This invention is primarily intended for grinding grooves in the outer races of ball bearings. See also patent 2,652,663.

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