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Alexander Graham Bell and Elisha Gray began on a quest to see who could create a devise when people can talk to each other.
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Bell had progressed his research and informed his father in law.
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Bell was experimenting with the harmonic telegraph and found out that you could hear through a wire.
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Bell and Gray applied for a patent for a simalar idea. Bell got his patent before Gray.
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Bell has succesfully invented the telephone. On this day the telegraph has vanished.
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The first switchboard was set up in Boston.
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The constuction of the first telephone line.
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The first telephone exchange was established in New Haven.
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There were more than 47,900 telephones in the United States of America (U.S.A.).
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Leroy Firman was the first person with the right for the telephone switch board.
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Allan B. Strowger invented a switch that could connect to 100 linesusing relays and sliders.
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Almon Stowger issued a patent for the first automatic telephone exchange.
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Telephone service between New York and Chicago.
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The first exchange using the Stowger switch was in La Porte Indiana.
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Telephone service between Boston and New York.
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The associate invented a rotary dial which replaced the button.
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The bell system completed the first coast to coast line from New York to San Fransisco.
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Mobile telephone began.
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The I Phone 3G came out by Apple.
