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US Patent: 1,771,172
Wrench
Patentee:
Bernard Fraser - Vancouver, BC Canada

USPTO Classifications:
81/127, 81/129.5, 81/165

Tool Categories:
wrenches : wrench adjustment types : self-adjust wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
none listed

Patent Dates:
Applied: Mar. 14, 1929
Granted: Jul. 22, 1930

Patent Pictures:
USPTO pdf tiff
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