| Examples/ definitions with source references | This tool is also commonly referred to by various trademarks or brand names. "Allen wrench" was originally a trademark of the Allen Manufacturing Company in Hartford, Connecticut, taken out in 1943. In non-English speaking parts of Europe, it is usually known as an "Unbrako key" (often misspelled "Umbrako"), which is a brand name established in 1911. The brand is owned by SPS Technologies. In Germany and the Netherlands, this type of screw is known by the name "Inbus", after the company that patented them in 1936, Bauer & Schaurte Karcher in Neuss (Innensechskantschraube Bauer und Schaurte). (It is still known as an Inbus-key—often misspelled as Imbus-key—in parts of Europe.)
Wikipedia
Allen wrench
n.
A tool consisting of an L-shaped bar with a hexagonal head, used to turn screws with hexagonal sockets.
[Originally a trademark.]
answers.com
Allen wrench
–noun
a wrench for Allen screws, formed from a piece of hexagonal bar stock bent to a right angle.
[Origin: formerly a trademark]
Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
American Heritage Dictionary
Allen wrench
n. A tool consisting of an L-shaped bar with a hexagonal head, used to turn screws with hexagonal sockets.
[Originally a trademark.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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