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US Patent: 1,520,653
Wrench
Patentee:
Henry O. Johnson (exact or similar names) - Virginia, MN

USPTO Classifications:
81/143, 81/147

Tool Categories:
wrenches : wrench adjustment types : quick adjust wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
J E.L. Moore
I. Josephine Watson
W. D. Hayes
J. R. Krogdahl
Patent Dates:
Applied: Feb. 25, 1922
Granted: Dec. 23, 1924

Patent Pictures:
Henry O. Johnson patent December 23, 1924
USPTO (New site tip)
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Description:
A cam lever in the handle binds the movable jaw against the frame.

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