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The Antique Wrench Patent Archive

Every grip the nineteenth century took on a nut

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Dog-whistle tool

Line drawing of a slender cylindrical gun tool with a ring-shaped head (labeled D, f, g, i, B) at one end and a hexagonal socket (C) at the other, shown in perspective, section, and detached views with a modified nipple socket C' in a fourth figure.

COMBINATION GUN-TOOLAlbrecht Edward Barthel · March 14, 1876

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