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US Patent: 291,213
Monkey Wrench
Patentee:
Charles H. Miller (exact or similar names) - Erie, PA

USPTO Classifications:
81/157, 81/177.1

Tool Categories:
wrenches : nut wrenches

Assignees:
Lovell Manufacturing Company - Erie, PA

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Jun. 09, 1883
Granted: Jan. 01, 1884

Patent Pictures:
Charles H. Miller patented January 1, 1884
USPTO (New site tip)
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Description:
The wrench is assembled from three malleable iron parts and rivet. The only subsequent machine work needed to assemble the wrench is to drill the hole for the rivet, and peen it.

Ken Cope's "American Wrench Makers 1830-1930" asserts the Lovell Mfg. Company produced this wrench.

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