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US Patent: 1,831,813
Attachment for drills
Centering guide
Patentee:
Axel Levedahl - Aurora, IL

USPTO Classifications:
408/112, 408/81, 606/96

Tool Categories:
woodworking machines : handheld power tools : handheld power tool accessories

Assignees:
Independent Pneumatic Tool Co. - Chicago, IL

Manufacturer:
Independent Pneumatic Tool Co. - Chicago, IL

Witnesses:
Unknown

Patent Dates:
Applied: Jul. 02, 1928
Granted: Nov. 17, 1931

Patent Pictures:
USPTO pdf tiff
Google Patents
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"Vintage Machinery" entry for Thor Power Tool Co.
Description:
Assignee Independent Pneumatic Tool Company changed its name in 1953 to Thor Power Tool Co.

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