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US Patent: 620,143
Wrench
Patentee:
Charles Johnson (exact or similar names) - West Superior, WI

USPTO Classifications:
81/175, 81/186, 81/58.2, 81/61

Tool Categories:
wrenches : ratchet wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
E. C. Duffy
Chas. E. Brock
Chas. Elmgren
Wm. J. Allen
Patent Dates:
Applied: Jun. 20, 1898
Granted: Feb. 28, 1899

Patent Pictures:
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Report data errors or omissions to steward Stan Schulz
Description:
Ratchet open end wrench. The jaws have concealed slots and threads to accommodate a screw-adjusted sliding block that can be used to adjust the opening size or to clamp in an adjustable jaw work holder.

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