As posted by Martin Howard on antiquetypewriter.com: "In 1892, Hall had the skilled local Gunsmith and Metal worker Gustav Siebel make a prototype of his machine. Hall took Sieber’s prototype to the Munson Typewriter Company in Chicago, where superintendent T. B. Harrison and designer Samuel J. Seifried, inventor of the Munson typewriter, created six pilot models. Harrison and Seifried in seeing the great potential of this revolutionary machine, then left the Munson Typewriter Company to start their own company. They made an additional 94 machines based on the initial design for Hall. The Hall Braille-writers that followed were essentially of the same design but there were alterations to be seen, especially in the carriage construction." When Sam J. Seifried died around early January, 1913, his obituary hailed him as a great supporter of the blind community. He invented and manufactured many machines to assist the blind. His work was carried on by his brother.