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US Patent: 12,935
Wrench
Improved Screw-Wrench
Patentee:
Frances S. Coburn (exact or similar names) - Ipswich, MA

USPTO Classifications:
81/166

Tool Categories:
wrenches : wrench adjustment types : screw adjust wrenches

Assignees:
Ruggles, Nourse, Mason & Co. - Ipswich, MA

Manufacturer:
Not known to have been produced

Witnesses:
Caleb Eddy
F. P. Hale, Jr.
Patent Dates:
Applied: Apr. 14, 1853
Granted: May 22, 1855

Patent Pictures:
Frances S. Coburn Pat. May 22, 1855
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Description:
The patent is for an adjustable box end wrench.

Ruggles, Nourse, Mason & Co. produced plows and other agricultural implements.

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