Sholes and Glidden typewriter seeking to diversify, Remington further refined the typewriter before finally placing it on the market on July 1, 1874. During its development, the typewriter evolved from a crude curiosity into a practical device, the basic form of which became the industry standard. The machine incorporated elements which became fundamental to typewriter design, including a cylindrical platen and a four-rowed QWERTY keyboard. Several design deficiencies remained, however. The Sholes and Glidden could print only upper-case letters—an issue remedied in its successor, the Remington No. 2—and was a "blind writer", meaning the typist could not see what was being written as it
Blickensderfer typewriter Blick 8's were produced, accounting for about 10% of all Blick models sold. The Model 9, believed to be introduced in mid-1910, was similar in appearance to the Model 8, but lacked the nickel plated tabulator keys and also featured a folding ink roller arm support similar to the Blick Featherweight. Only about 10,000 machines were produced, ending in 1919. On August 4, 1891, after several prototypes, Blickensderfer patented The Blickensderfer Type Writing Machine. The central component was the use of the cylindrical shaped interchangeable type element which he initially patented on July 15, 1890. An earlier variation to Blickensderfer's