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US Patent: 473,617
Socket Wrench
Patentee:
Benjamin Hopkins Dunlap - St. Louis, MO

USPTO Classifications:
81/119, 81/128, 81/170, 81/DIG.5

Tool Categories:
wrenches : axle nut wrenches

Assignees:
William H. Dunlap - St. Louis, MO

Manufacturer:
Not known to have been produced

Witnesses:
W. S. Duvall
H. J. Seitz
W. I. Wilson
T. J. Cheney

Patent Dates:
Applied: Aug. 07, 1891
Granted: Apr. 26, 1892

Patent Pictures:
Benjamin Hopkins Dunlap patent April 26, 1892
USPTO pdf tiff
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Description:
Combination screw- and cam-wheel adjusting axle nut wrench. The screw adjusting jaw sets the general size; the cam-wheel adjusting jaw clamps the wrench to the axle nut.

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