Allan-Diffenbaugh Wrench & Tool Works


(Baraboo, WI) - Formed by Allen C. Allan and William A. Diffenbaugh, possibly succeeding A. C. Allan & Co.  Articles of incorporation filed 5/6/1920.  Incorporators are Allen C. Allan, Louis M. Allan, and Adolph Andro.  The company initially set up in the Elkington Building in Baraboo. In 1922, the company offered inducements to the town of Appleton, WI in an attempt to relocate their factory.  The success or failure of this effort is unknown.  On October 1, 1922, Lorenz Maisel took over as GM of the company.  He had previously been with the Madison Tool & Stamping Works.  By 1927, they appear to be in bankruptcy.

DATAMP patents for Allen C. Allan

Here is an article from International Steam Engineer from 1921 which includes a picture of the inside of the plant. 

Article from the September 1920 edition of Railway Locomotives & Cars describing the Automatic Wrench. 

Article from October 1920 edition of Commercial America, one of the first for the Kant-Slip Plier / Wrench.

Sub Brands / Trade Names / Trademarks

  • Kant-Slip (Wrenches) (1920-1923)