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SourceJoseph Henry invented the electrical generator. A few weeks later. Michael Faraday turned in the same invention before Joseph Henry so he got all the credit.
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SourceIn the 1870's, Elisha Gray and Alexander Graham Bell both independently designed devices that could transmit speech. Their designs were turned in within hours of each other.
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Source Alexander Graham Bell and Elisha Gray entered into a famous legal battle over who invented the telephone. Bell won this arguement.
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Source The telephone was officially working on March 10, 1876. Alexander Graham Bell called out to his assistant, Mr. Watson, and he heard everything that was said.
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Source J.P. Maxfield and H.C. Harrison of AT&T devised the first recording and reproducing system using electricity. Earlier systems used conversion between sound and mechanical energy.
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Source The recording industry adopted electrical recording in 1925. This was the most advanced recording method at the time.
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Source The AT&T labs developed car phones in the 1940's and continued to seek improvements. Until recently, mobile phones were not popular.
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SourceIn 1941, AT&T made the first touch tone phone and it was installed at this time. This inabled us to be able to use the number keys to dial.
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SourceAT&T created the first television picture relayed from earth to space and back occured on July 10,1962. It showed the American Flag. This allowed telephone calls to connect globally.
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SourceThe first picturephone test system was built in 1956 by AT&T. It transmitted an image once every 2 seconds.
