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US Patent: 1,403,366
Screw Punch
Patentee:
William A. Whitney - Rockford, Winnebago County, IL

USPTO Classifications:
408/102

Tool Categories:
metalworking machines : metal punches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Feb. 12, 1920
Granted: Jan. 10, 1922

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Roper-Whitney Co.

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