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US Patent: 2,793,547
Adjustable bit boring bar
Patentees: Franklyn E. Winnen (exact or similar names) - Cleveland, OH Milton L. Benjamin (exact or similar names) - Cleveland, OH USPTO Classifications: 408/153 Tool Categories: metalworking machines : drilling and boring : facing heads Assignees: Erickson Tool Co. - Cleveland, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Nov. 26, 1954 Granted: May 28, 1957 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Erickson Tool Co.

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