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US Patent: 1,491,523
Adjustable drilling and balancing tool
Patentee:
Gustaf H. Ekstrom - Rockford, IL

USPTO Classifications:
173/44, 173/50, 408/52, 73/480

Tool Categories:
specialty machines : balancing machinery

Assignees:
Rockford Tool Co. - Rockford, IL

Manufacturer:
Rockford Tool Co. - Rockford, IL

Witnesses:
Unknown

Patent Dates:
Applied: Jul. 26, 1919
Granted: Apr. 22, 1924

Patent Pictures:
USPTO pdf tiff
Google Patents
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"Vintage Machinery" entry for Rockford Tool Co.

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