-
Electrical generator
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. -
Telephone designs
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. -
First telephone invention
Source Alexander Graham Bell and Elisha Gray entered into a famous legal battle over who invented the telephone. Bell won this arguement. -
First audible voice over telephone
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. -
First recording system
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. -
Electrical recording
Source The recording industry adopted electrical recording in 1925. This was the most advanced recording method at the time. -
Car phones
Source The AT&T labs developed car phones in the 1940's and continued to seek improvements. Until recently, mobile phones were not popular. -
First touch tone phone
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. -
First television picture
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. -
First picturephone
SourceThe first picturephone test system was built in 1956 by AT&T. It transmitted an image once every 2 seconds.
