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US Patent: 6,002
Screw Wrench For Grasping Cylindrical Forms
Solyman Merrick - Springfield, MA
Frederick H. Bartholomew - New York City, NY

USPTO Classifications:

Tool Categories:
wrenches : pipe wrenches
wrenches : wrench components : wrench jaw components


Bemis & Call - Springfield, MA

Geo. Ireland, Jr.
Jas. P. Howard

Patent Dates:
Applied: Jul. 20, 1848
Granted: Jan. 02, 1849

Patent Pictures:
Bartholomew & Merrick patent Jan. 2, 1849, with example - photo courtesy & copyright Martin J. Donnelly mjdtools.com
USPTO pdf tiff
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The wrench has a "hook" shaped fixed jaw, and a toothed "lever" portion on the adjustable jaw. Merrick describes this as an improvement on his Aug. 15, 1848 patent 5,707. The hook jaw portion of this pipe wrench design was used by Bemis & Call for pipe wrenches until just before WWII. Wrenches citing this patent and matching this design are shown in period B&C advertising; few of the wrenches have survived.

This patent noted in patent nos. 15,184 & 18,135.

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