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US Patent: 1,684,633
Screw or nut driving device for portable power-driven rotary tools
Patentee:
Axel Levedahl - Aurora, IL

USPTO Classifications:
192/56.61, 464/39, 81/54, 81/57

Tool Categories:
specialty tools : handheld power tools
woodworking machines : 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 pdf tiff
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"Vintage Machinery" entry for Thor Power Tool Co.

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