when did alexander graham bell invent the telephone

Alexander Graham Bell invented the telephone and was granted the US patent for it on March 7, 1876. Just three days later, on March 10, 1876, Bell made the first successful telephone call to his assistant Thomas Watson, saying the now-famous words, "Mr. Watson, come here—I want to see you." Bell's invention was designed to transmit speech telegraphically, which was a significant advancement from conventional telegraphy. The Bell Telephone Company was formed in 1877 to develop and commercialize the invention, which rapidly revolutionized communication.