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Alexander Bell discovers the first principle of the telephone. The prinicple was that if a message is spoken at one end it produces impulses which reproduce the message to the one listening. January 1rst was not the actual date.
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Alexander Graham Bell made the first telephone call to Thomas Watson. This took place on March, 10, 1876.
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In 1877 Thomas Edison revieved the patent in Britain for the electro-motograph. His carbon-based transmitter is still used today in telephones. January 1rst was not the actual date.
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In 1887 Gardiner Hubbard formed the Bell Telephone Company. They made phones under the direction of Thomas Watson. January rst was not the actual date.
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In 1878 Tivadar Puska's made the first telephone exchange. This allowed subscribers to get on the same line as another subscrber because of a human operator that switched the lines. January 1rst was not the actual date.
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On November 21, 1878 Thomas Edison annouced his invention the phonograph. It was a device for recording and replaying sound.
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In 1880 WIlliam Gray installed the first pay telephone. You could insert money and call someone. January 1rst was not the actual date.
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In 1883 Thomas Edison discovered the flow of electronic in a vacuum. This vacuum was called the Edison effect, the foundation of the electronic tube. January 1rst was not the actual date.
