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US Patent: 580,685
Pipe Wrench
Patentee:
Osborn B. Hall (exact or similar names) - Malden, MA

USPTO Classifications:
269/251, 269/283, 81/164, 81/185.1

Tool Categories:
wrenches : pipe wrenches

Assignees:
None

Manufacturer:
Walworth Mfg. Co. - Boston, MA

Witnesses:
Jas. J. Maloney
N. P. Ford
H. J. Livermore
Patent Dates:
Applied: Dec. 21, 1896
Granted: Apr. 13, 1897

Patent Pictures: [ 1 | 2 ]
Osborn B. Hall patent April 13, 1897
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Description:
Gripping sleeves clamp into a frame. Designed as a non-marring, non-crushing wrench for brass and similar soft metal threaded pipe.

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