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US Patent: 95,103
Loosening and Tightening Screw Caps of Fruit Jars
Patentee:
Alonzo French - Philadelphia, PA

USPTO Classifications:
81/3.44, 81/426.5

Tool Categories:
wrenches : jar wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
John White
Louis Boswell
Wm. A. Stut
Jno. B. Karding
Patent Dates:
Granted: Sep. 21, 1869

Patent Pictures:
Alonzo French Pat. Sept. 21, 1869
USPTO pdf tiff
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Description:
The jar wrench has the inner surface of the clamping jaws formed to match the screw-threads of the corresponding ring.

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