Series B: Professional Papers, 1910-1987, n.d.

The Professional Papers series (1918-1987, n.d.) is composed of records Kamrath created or collected in service to the architecture profession but outside the design and construction process of his business. This series contains documentation of Kamrath's involvement with associations and committees, his correspondence with fellow architects, writings and presentation materials, awards he received, and a number of reference files related to the field of architecture. There are five subseries: Correspondence, Writings, Presentations, Associations and Committees, Awards and Recognitions, Reference Files, and Frank Lloyd Wright Related Materials.

The Correspondence subseries includes letters exchanged with fellow architects, including Alden Dow, Hal and William Pereira, and Eugene Massilink, Frank Lloyd Wright's secretary. Kamrath's office reference files, begining with "Carpentry" and ending with "Metal," contains product brochures and samples, instructional material, and reference manuals.

The Frank Lloyd Wright Related Materials subseries is comprised of records collected by Karl Kamrath that document the architectural work of Frank Lloyd Wright, including clippings, photographs, postcards, catalogs, reproduction of Wright's drawings, a bibliography on Wright, and correspondence with Mrs. Wright.