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US Patent: 1,872,392
Wrench For Automobile Hub Caps
Patentees:
Walter  A. Bishman - Minneapolis, MN
Harold G. Lien - Minneapolis, MN

USPTO Classifications:
7/100, 81/174, 81/186, 81/442, 81/461

Tool Categories:
wrenches : automotive specialty wrenches
wrenches : wrench adjustment types : screw adjust wrenches

Assignees:
None

Manufacturer:
Unknown

Witnesses:
none listed

Patent Dates:
Applied: Mar. 20, 1929
Granted: Aug. 16, 1932

Patent Pictures: [ 1 | 2 ]
Walter A. Bishman and Harold G. Lien patent August 16, 1932
USPTO pdf tiff
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Description:
"It is an object of our invention to provide a simple, compact wrench which will have practically universal application to hub caps on motor vehicles sold at this time.."

It will grip internal and external hex, external octagon, and has pins for sockets. One handle with internal threads adjusts the movable jaw.

Known example marked "THE BISHMAN CO. MPLS MINN PAT PEND. UNIVERSAL HUB CAP WRENCH." is about 15 inches long in closed position.

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