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US Patent: 725,103
Wrench
Improved Chain Wrench
Patentee:
Richard James Lockhart (exact or similar names) - Pittsburgh, PA

USPTO Classifications:
81/168, 81/65

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

Assignees:
None

Manufacturer:
Lockhart Wrench Co. - Philadelphia, PA

Witnesses:
James L. Wehn
Harry Hatton
J. H. Cooke

Patent Dates:
Applied: Jan. 08, 1903
Granted: Apr. 14, 1903

Patent Pictures: [ 1 | 2 ]
Richard James Lockhart patent April 14, 1903
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Description:
Turning the handle moves the slide with the hook. The end of the chain is attached to an eye piece. The chain is composed of multiple small links.

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