The telephone was invented in March of 1876. The famous incident in which AlexanderGraham Bell spilled acid on himself and called out to his assistant, Watson, not realizing his voice was being carried over the telephone was on March 10.
According to wikipidia, the telephone was pattened January 30, 1877 by Alexander Bell; however, the first telephone may have been made in 1849 by Antonio Meucci.
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