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US Patent: 278,896
Nut Arbor
Patentee:
Patrick Duffy (exact or similar names) - New Bedford, Bristol County, MA

USPTO Classifications:
470/206

Tool Categories:
metalworking tools : mandrels and arbors

Assignees:
Patrick Duffy - New Bedford, Bristol County, MA
James F. Powers - New Bedford, Bristol County, MA

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Mar. 06, 1883
Granted: Jun. 05, 1883

Patent Pictures:
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