Double-ended box wrench

Details Double-ended box wrench Double-ended box wrench

1986-06-30

1989-08-29

Dunkins, Bruce W.

Tools and hardware

Other tools and implements

Wrench

Patent

active

D03030695

REFERENCES:
patent: D34540 (1901-05-01), Engstrom
patent: 1184711 (1916-05-01), Baxter et al.
patent: 1297846 (1919-03-01), Herrman
patent: 3215009 (1965-11-01), Peterson
Proto Tool Catalog #PR120-6902, p. 20/Combination Wrench to right of page.

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