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US Patent: 3,169,416
Boring head and method of using same
Patentees: Friedrich H. Burkhardt (exact or similar names) - Eislingen, Göppingen District, Baden-Württemberg, Germany Ernest Carlson (exact or similar names) - Birmingham, Oakland County, MI USPTO Classifications: 408/181, 408/1R, 82/1.4 Tool Categories: metalworking machines : drilling and boring : boring heads metalworking tools : boring bars Assignees: Ex-Cell-O Corp. - Detroit, Wayne County, MI Manufacturer: Ex-Cell-O Corp. - Detroit, Wayne County, MI Witnesses: Unknown	Patent Dates: Applied: Sep. 05, 1961 Granted: Feb. 16, 1965 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Ex-Cell-O Corp.

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