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US Patent: 588,991
Pipe Wrench
Patentee:
David A. Henderson - Fond du Lac, WI

USPTO Classifications:
335/213, 81/131, 81/413, 81/426

Tool Categories:
wrenches : pipe wrenches : pipe tongs

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
B. C. Roloff
Geo. W. Young
H. G. Underwood

Patent Dates:
Applied: Aug. 03, 1896
Granted: Aug. 31, 1897

Patent Pictures:
David A. Henderson patent August 31, 1897
USPTO pdf tiff
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Description:
Tongs type with an adjustable pivot point formed by inter-meshing rack teeth.

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