In 1899 Carlisle 's firm merged with a competing firm run by Henry G. Bachmann .
In 1899 Carlisle 's firm changed its name to Bachmann Bros. By 1902 Bachmann Bros. started to use celluloid for its products and by 1912 introduced optical frames that were made from it .
In 1899 Carlisle 's firm merged with a competing firm run by Henry G. Bachmann and changed its name to Bachmann Bros. By 1902 Bachmann Bros. started to use celluloid for its products and by 1912 introduced optical frames that were made from it .