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US Patent: 612,454
Pipe Wrench
Patentee:
Mat Blackwell (exact or similar names) - Lebanon, VA

USPTO Classifications:
81/129, 81/97

Tool Categories:
wrenches : pipe wrenches

Assignees:
Mat Blackwell - Lebanon, VA
O. S. Burns - Lebanon, VA
William E. Burns - Lebanon, VA

Manufacturer:
Not known to have been produced

Witnesses:
J. Grant Culverwell
H. J. Benebord
C. C. Burns
Wm. E. Burns
Patent Dates:
Applied: Feb. 21, 1898
Granted: Oct. 18, 1898

Patent Pictures:
Mat Blackwell patent October 18, 1898
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Description:
The size adjusts by shifting the pivot point; a spring closes the jaws.

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