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US Patent: 347,179
Wrench Attachment
William Alexander Kelly - East Tawas, MI
Charles Henderson Hubbell - East Tawas, MI

USPTO Classifications:
81/184, 81/186

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


Kelly & Hubbell - East Tawas, MI

Dugald McKillop
Robert Kirk
H. C. Way
James Richards

Patent Dates:
Applied: Nov. 23, 1885
Granted: Aug. 10, 1886

Patent Pictures: [ 1 | 2 ]
William A. Kelly and Charles H. Hubbell patent August 10, 1886
USPTO pdf tiff
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This wedge-shaped block with gripping teeth and a spring clip to attach it to the movable jaw of a monkey wrench is a pipe grip.

A known example has sufficient visible markings to infer that Kelly and Hubbell produced it at East Tawas, MI.

Corresponding Canadian patent CA-27,019 was granted June 22, 1887,

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