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US Patent: 1,363,316
Cap Wrench
Patentee:
John Dudek (exact or similar names) - Campbell, NE

USPTO Classifications:
81/3.44, D8/39

Tool Categories:
wrenches : jar wrenches

Assignees:
None

Manufacturer:
Dudek Manufacturing Co. - Lincoln, NE

Witnesses:
R. E. Hamilton

Patent Dates:
Applied: Jul. 12, 1919
Granted: Dec. 28, 1920

Patent Pictures:
John Dudek patent December 28, 1920
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"DUDEK" Jar wrench & Jar Clamp (1922 ad)
Description:
The gripping sections are riveted to the handles; a spring tends to open the grip. The specifications note application on Mason jars; the illustration shows a "zinc" lid with glass inner lid and rubber seal ring between the lid and jar shoulder.

A known example does not show evidence of ever having any permanent markings. Dudek's CAP WRENCH and JAR CLAMP (pat. no. 1,410,390) appear in a June 1922 NEBRASKA IRONMONGER ad, with address given as 2222 Y Street, Lincoln, NE.

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