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US Patent: 3,206,030
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Patentee: Mark R. Estabrook (exact or similar names) - Rockford, IL USPTO Classifications: 210/108, 210/138, 210/358, 210/387, 210/391, 210/97 Tool Categories: Assignees: Barnes Drill Co. - Rockford, IL Manufacturer: Barnes Drill Co. - Rockford, IL Witnesses: Unknown	Patent Dates: Applied: Aug. 22, 1962 Granted: Sep. 14, 1965 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Barnes Drill Co.

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