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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:
Not known to have been produced

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.

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