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Acoustic telegraphy (also known as harmonic telegraphy) was a name for various methods of multiplexing (transmitting more than one) telegraph messages simultaneously over a single telegraph wire by using different audio frequencies or channels for each message.
Alexander Graham Bell was a professor of elocution at Boston University and tutor of deaf children. He had begun electrical experiments in Scotland in 1867 and, after emigrating to Boston from Canada, pursued research into a method of telegraphy that could transmit multiple messages over a single wire simultaneously, a so-called "harmonic telegraph".
Watson in his later years, holding Bell's original telephone. Born in Salem, Massachusetts, [1] United States, Watson was a bookkeeper and a carpenter before he found a job more to his liking in the Charles Williams machine shop in Boston in 1872. [2] He was then hired by Alexander Graham Bell, who was then a professor at Boston University.
Alexander Graham Bell (/ ˈ ɡ r eɪ. ə m /; born Alexander Bell; March 3, 1847 – August 2, 1922) [4] was a Scottish-born [N 1] Canadian-American inventor, scientist, and engineer who is credited with patenting the first practical telephone. He also co-founded the American Telephone and Telegraph Company (AT&T) in 1885. [7]
Alexander Graham Bell, about to call San Francisco from New York. A telephone call, which for marketing purposes is claimed to be the first transcontinental telephone call , occurred on January 25, 1915, a day timed to coincide with the Panama–Pacific International Exposition celebrations.
The Telephone Cases, 126 U.S. 1 (1888), were a series of U.S. court cases in the 1870s and the 1880s related to the invention of the telephone, which culminated in an 1888 decision of the U.S. Supreme Court that upheld the priority of the patents belonging to Alexander Graham Bell.
2.2 Telegraph and ... Elisha Gray and Alexander Graham Bell, ... industry was estimated to be $1.5 trillion in 2010, corresponding to 2.4% of the world's ...
The Oriental Telephone Company was established on January 25, 1881, as the result of an agreement between Thomas Edison, Alexander Graham Bell, the Oriental Bell Telephone Company of New York and the Anglo-Indian Telephone Company, Ltd.