l>US Patent: 1,413,121 - Wrench
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US Patent: 1,413,121
Wrench
Patentee:
JohnArthurJohnson - Leavenworth, KS
USPTO Classifications:
81/175
Tool Categories:
wrenches
Assignees:
None
Manufacturer:
Not known to have actually been produced
Witnesses:
W.F.Buckley
GeorgeC.Myers
Patent Dates:
Applied:Mar.23,1921
Granted:Apr.18,1922
Patent Pictures:
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USPTO pdftiffGoogle PatentsReport data errors or omissions Jack Johnson"s patents (pdf) Description:
Turning the finish of the manage adjusts the jaw opening; the efficient length the the manage lengthens together the jaws open.

This patent is that note because the inventor was former world heavyweight champion Jack Johnson, the very first black male to hold that title.

"My creation relates to renovations in wrenches and also has for its object to carry out an boosted wrench which is of basic and long lasting construction, trusted in operation and easy and also inexpensive come manufacture, which might be easily and readily adjusted and i m sorry is adapted to exert a powerful gripping activity upon the work.

"Another thing is to carry out an improved wrench the this character which in assembly presents a substantially unitary structure and also which might be conveniently disassembled for purposes of instead of or repair."