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Coes Wrench Company

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Adapted from the English Wikipedia article Coes Wrench Company, available under CC BY-SA 4.0Updated 27 November 2025
Coes Wrench Company
Company typePrivate
IndustryTool manufacturing
FoundedApril 1, 1888; 138 years ago (1888-04-01) in Worcester, Massachusetts, United States
FounderLoring Coes, Aury Gates Coes
Headquarters
Worcester
,
United States
ProductsScrew-type wrench (monkey wrench)

Coes Wrench Company was a manufacturer of tools located in Worcester, Massachusetts, originally emerging from L. and A. G. Coes & Co. Established on April 1, 1888, the firm specialized in producing the screw-type wrench invented by Loring Coes, widely recognized as the monkey wrench.

Early company history

Loring Coes and his brother Aury Gates Coes began their careers at Kimball and Fuller, a producer of woolen machinery. In 1836, they acquired this business and formed a partnership known as L. & A. G. Coes. Following a fire that destroyed their plant in October 1839, they moved to Springfield, Massachusetts where they found employment as pattern makers at Laurin Trask's foundry.

Invention of the screw wrench

During their time in Springfield, Loring Coes developed the screw wrench (monkey wrench), which enhanced previous designs such as the two-handled English patent and Merrick wrenches by enabling adjustment with only one hand.

To fund the patent obtained by Loring Coes on April 16, 1841, the brothers sold spinning machine patterns salvaged after the fire, securing the rights to their significant invention.

L. & A. G. Coes

Following the patent acquisition for the screw wrench, L. & A. G. Coes restarted production focused on manufacturing their groundbreaking wrench design.

Merger

In 1888, Coes Wrench Company combined with Loring Coes & Company, strengthening their position within the market.

See also

External links