Adjustable Wrench & Specialty Manufacturing Company (Oshkosh, WI) - Incorporated in IL on May 3, 1904 by P. M. Knippenberg, F. W. Hahn and L. J. Husson. They produced wrenches based on a patent from 5/12/1903. Mr. Knippengerg is also President of the Knippenberg Manufacturing Company of Oshkosh, which predominately produces products against the patents of Mssrs. Knippenberg and Husson.
Patent #728,007 by William H. Preston - Wrench - Assigned to Knippenberg