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US Patent: 260,771
Monkey Wrench
Patentee:
Charles H. Miller - Erie, PA

USPTO Classifications:
81/166

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

Assignees:
None

Manufacturer:
Girard Wrench Mfg. Co. - Girard, PA

Witnesses:
C. Smalley
Jno. K. Hallock
Robt. H. Porter
W. R. Edelen

Patent Dates:
Applied: Dec. 21, 1881
Granted: Jul. 11, 1882

Patent Pictures:
Charles H. Miller patent July 11, 1882
USPTO pdf tiff
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Description:
The parts are to be made of malleable iron castings. The slide for the head is cast "spread" and is closed around the head after the head and adjusting worm are installed.

Most known examples do not have legible markings; some may have the patent date visible.

Comparable Canadian patent no. CA-16,300 shows the Girard Wrench Company as assignee.

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