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US Patent: 1,362,481
Wrench
Patentee:
Michael G. Dobbins (exact or similar names) - Philadelphia, PA

USPTO Classifications:
81/179

Tool Categories:
wrenches : pipe wrenches
wrenches : wrench adjustment types : screw adjust wrenches

Assignees:
Michael G. Dobbins - Philadelphia, PA
Frederick H. Shaw - Norristown, Montgomery County, PA

Manufacturer:
Not known to have been produced

Witnesses:
C. D. McVay
E. Hayward Fairbanks
Patent Dates:
Applied: Mar. 11, 1920
Granted: Dec. 14, 1920

Patent Pictures:
Michael G. Dobbins patent Dec. 14, 1920
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Description:
Pipe wrench with worm and rack adjustment, and spring tensioned gripping surface in the adjustable jaw.

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