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US Patent: 20,168
Cutting Screws
Patentee:
Richard Nuttall - Allegheny, Allegheny County, PA

USPTO Classifications:
279/114, 408/174, 470/75

Tool Categories:
metalworking tools : taps and dies

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Granted: May 04, 1858

Patent Pictures:
USPTO pdf tiff
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