Automatic dialing system (1 gen 1891 anni – 31 dic 1891 anni)
Descrizione:
First automatic dialing system invented by a Kansas City undertaker. He believed that crooked operators were sending his potential customers elsewhere. It was his aim to get rid of the operators altogether.Aggiunto al nastro di tempo:
Data:
1 gen 1891 anni
31 dic 1891 anni
~ 12 months