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US Patent: 674,194
Chain Wrench
Patentee:
William H. Brock - Long Island City, NY

USPTO Classifications:
81/70

Tool Categories:
wrenches : pipe wrenches : chain and strap wrenches

Assignees:
None

Manufacturer:
Brock Wrench Mfg. Co. - Brooklyn, NY

Witnesses:
J. L. McAuliffe
Edward Thorpe
Everard Bolton Marshall

Patent Dates:
Applied: Feb. 08, 1901
Granted: May 14, 1901

Patent Pictures: [ 1 | 2 ]
William H. Brock patent May 14, 1901
USPTO pdf tiff
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Description:
The "hooks" on opposite side of the gripping head are offset from each other, to provide a greater sub-division of effective gripping surface within the overall capacity of the wrench.

Advertised as Brock's YANKEE pipe wrench; in 6 sizes ranging in length from 20 to 64 inches.

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