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US Patent: 1,060,467
Chain Drill
Patentee: George O. Leopold (exact or similar names) - Philadelphia, PA USPTO Classifications: 408/92 Tool Categories: woodworking tools : hand drills : drill accessories Assignees: North Brothers Manufacturing Co. - Philadelphia, PA Manufacturer: North Brothers Manufacturing Co. - Philadelphia, PA Witnesses: Wm. E. Shupe Wm. A. Barr	Patent Dates: Applied: Dec. 15, 1911 Granted: Apr. 29, 1913 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Russ Allen. "Vintage Machinery" entry for North Bros. Manufacturing Co.

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