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US Patent: 16,733
Improvement in Screw-Wrenches
Patentee:
Benjamin F. Joslyn - Worcester, MA

USPTO Classifications:
81/167

Tool Categories:
wrenches : nut wrenches

Assignees:
None

Manufacturer:
Southgate & Fiske - Worcester, MA

Witnesses:
John P. Marshall
Lewis Thayer

Patent Dates:
Granted: Mar. 03, 1857

Patent Pictures:
Benjamin F. Joslyn patent March 3, 1857
USPTO pdf tiff
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Description:
This modification of Joslyn's July 10, 1855 patent (no 13,221) has threads on two sides of the adjustable jaw rather than only on one side, and reflects the way the wrench was actually produced.

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