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US Patent: 2,571,904
Broaching machine
Patentee: Charles O. Lofgren (exact or similar names) - Ann Arbor, MI USPTO Classifications: 409/252, 409/268, 409/269, 409/277, 451/335, 83/109 Tool Categories: metalworking machines : broaching machines Assignees: American Broach & Machine Co. - Ann Arbor, MI Manufacturer: American Broach & Machine Co. - Ann Arbor, MI Witnesses: Unknown	Patent Dates: Applied: May 25, 1949 Granted: Oct. 16, 1951 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for American Broach & Machine Co.

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