C.P. Goertz, Berlin and Vienna
"C. P. Goerz was founded in 1886 by Carl Paul Goerz. Originally, it made mathematical tools for schools. From 1888 it made cameras and lenses. During the First World War, Goerz's main production was for the German and Austrian military. Goerz is known primarily for Anschuetz strut-folding cameras, Dagor lenses and Tengor and Tenax cameras, later continued by Zeiss Ikon.
In 1895 Goerz founded a branch in New York that was to become the C. P. Goerz American Optical Co in 1905. This company continued to operate independently in the US until 1972.
In 1908, Goerz Photochemisches Werk GmbH was founded in Berlin-Zehlendorf. This company produced roll film and film for the movie industry.
In 1926 the German branch of Goerz merged with ICA, Contessa-Nettel and Ernemann to form Zeiss Ikon. This had major consequences for the company; the Carl Zeiss company held a majority stake in the new company and demanded that the other firms end their lens production. This was the end of the famed Dagor lenses, at least in Europe."