Adler was also known as an automobile manufacturer, producing cars under the Adler name from 1899 to 1945, as well as a bicycle manufacturer from 1886 on. Adler was also a well-known typewriter and office machine manufacturer from 1898.
In 1969 Adler with its various interests was acquired by Litton Industries.
The factory in Frankfurt-Gallus still exists and was restored in the late 1990s for use as an office building. It also houses the Gallustheater and a restaurant.