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US Patent: 1,646,801
Grinding machine Triple grinding machine
Patentees: Frederick D. Van Norman (exact or similar names) - Springfield, MA George W. Fleming (exact or similar names) - Springfield, MA USPTO Classifications: 451/143, 451/398 Tool Categories: metalworking machines : grinders Assignees: Van Norman Machine Tool Co. - Springfield, MA Manufacturer: Van Norman Machine Tool Co. - Springfield, MA Witnesses: Unknown	Patent Dates: Applied: May 19, 1922 Granted: Oct. 25, 1927 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.

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