The Consolidated Radio Call Book Company published blueprints and instructions for building radio equipment. These were sold to amateur radio operators and hobbyist by radio parts stores across the United States. Hugo Gernsback was President and R. W. DeMott was Secretary of this publicly traded company. The name was changed to the Consrad Company in June 1923. The Electro Importing Company was selling more books and fewer radio parts and transitioned into a publishing company. Consrad began distributing the E. I. Co. books to radio dealers.