A trade catalog for the American index typewriter well stated a description for this company: "The American Typewriter Company was incorporated in 1893. Its officers are men who have been in the typewriter business for the past sixteen years, and are thoroughly fitted by long experience to conduct the manufacture of high-grade writing machines on a large scale. The machines are covered by United States and foreign patents. The factory is located at Derby, Conn., made famous as the home of Yankee ingenuity, and has a capacity of one hundred machines a day." You can find the trade catalog in the section of the same name on this website under "A" for American.