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US Patent: 253,266
Screw Nut
Patentee:
Samuel Darling - Providence, RI

USPTO Classifications:
470/176, 74/424.71, 74/441, 82/110

Tool Categories:
specialty machines : nut making machines

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
H. R. Davis
C. H. Mathewson

Patent Dates:
Applied: Oct. 29, 1881
Granted: Feb. 07, 1882

Patent Pictures:
USPTO pdf tiff
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