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US Patent: 1,684,633
Screw or nut driving device for portable power-driven rotary tools
Patentee: Axel Levedahl (exact or similar names) - Aurora, IL USPTO Classifications: 192/56.61, 464/39, 81/54, 81/57 Tool Categories: handheld power tools Assignees: None Manufacturer: Independent Pneumatic Tool Co. - Aurora, IL Witnesses: Unknown	Patent Dates: Applied: Sep. 23, 1927 Granted: Sep. 18, 1928 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Thor Power Tool Co.

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