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US Patent: 606,572
Pipe Wrench
Patentee:
James E. McDonald (exact or similar names) - Evansville, IN

USPTO Classifications:
81/94

Tool Categories:
wrenches : pipe wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Chas. E. Brock
T. W. Riley
Chas. E. Riordan
Patent Dates:
Applied: Nov. 04, 1897
Granted: Jun. 28, 1898

Patent Pictures:
James E. McDonald patent June 28, 1898
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Description:
A spur on the movable jaw catches a tooth in of rack teeth on the main shank for the size adjustment.

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