AB Cryptograph was a limited Swedish company developing and selling crypto machines, founded on 21 July 1916 and liquidated in 1930.
Impressed, Gyldén managed to interest a group of Swedish businessmen to invest in a project to exploit Damm's ideas commercially.
With the infusion of new money, primarily from Emanuel Nobel in 1922,[3] the company was kept alive and machines continued to be produced, but success proved elusive.
In 1928, in competition with the Zählwerk Enigma he managed to secure an order from the Swedish General Staff for a newly developed machine, the B-21.
It stayed in business until 1958 when all activities were transferred to Boris Hagelin's Swiss company Crypto AG, founded in 1952.