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US Patent: 168,852
Improvement in Pipe-Wrenches
William K. Stevens - Mansfield, OH

USPTO Classifications:
81/106, 81/132, 81/180.1

Tool Categories:
wrenches : pipe wrenches

William K. Stevens - Mansfield, OH
James A. Niman - Mansfield, OH
John B. Niman - Mansfield, OH

S. Park Lathrop - Newark, NJ

Chas. C. Gill
Fred. R. Goodridge
F. W. Wagner
Joseph Leech

Patent Dates:
Applied: Aug. 28, 1875
Granted: Oct. 19, 1875

Patent Pictures: [ 1 | 2 ]
William K. Stevens Pat. October 19, 1875
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The patent covers the toothed slide, and the renewable gripping surface. Marketed as the VICTOR ADJUSTABLE PIPE WRENCH. An 1879 ad is reprinted in Ken Cope's "American Wrench Makers 1830-1930."

A known example is marked, "Pat. Oct. 19, 1875 // P Lathrop & Co. // Newark, N. J. "

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