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US Patent: 355,270
Pipe Wrench
Improvements in Bolt-Holders
Patentee:
Price Johnson - Hutsonville, IL

USPTO Classifications:
81/106, 81/134

Tool Categories:
wrenches : pipe wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Richard Talbot
William L. Bishop
G. S. Elliott
E. W. Johnson

Patent Dates:
Applied: Mar. 18, 1886
Granted: Dec. 28, 1886

Patent Pictures:
Price Johnson patent December 28, 1886
USPTO pdf tiff
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Description:
The specifications describe the wrench in use on headless bolts, either to hold the shank, or as a holder for the heads of plow bolts. The movable base for the swinging hook slides in a central slot in the shank.

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