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US Patent: 514,721
Chain Pipe Wrench
Patentee:
Charles L. Mahnicke (exact or similar names) - Columbus, OH

USPTO Classifications:
81/68

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
H. B. Bradshaw
J. H. Fravel
C. C. Shepherd
Barton Griffith
Patent Dates:
Applied: Apr. 06, 1891
Granted: Feb. 13, 1894

Patent Pictures:
Charles L. Mahnicke patent February 13, 1894
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Description:
Improvement to patent no. 415,047 with improved means for holding the chain, and parallel rows of gripping teeth.

Noted as reference in patent no. 3,304,817.

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