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US Patent: 340,410
Pipe Wrench
Patentee:
Isaac Anderson (exact or similar names) - Saginaw, MI

USPTO Classifications:
81/91.3

Tool Categories:
wrenches : pipe wrenches

Assignees:
Isaac Anderson - Saginaw, MI
Thomas A. Perrott - Saginaw, MI

Manufacturer:
Not known to have been produced

Witnesses:
Villette Anderson
Grace M. Craig
F. A. King
D. A. Pettibone
Patent Dates:
Applied: Aug. 03, 1885
Granted: Apr. 20, 1886

Patent Pictures:
Isaac Anderson patent April 20, 1886
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Description:
A compound leverage wrap-around jaw design.

Anderson's March 8, 1887 patent (no. 359,197) refined the design.

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