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Who has the first patent of Telephone Invention ?

Alexander Graham Bell
Innocenzo Manzetti
Elisha Gray
Antonio Meucci

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Credit for the invention of the electric telephone is disputed but Alexander Graham Bell was the first to be awarded a patent for the electric telephone by the United States Patent and Trademark Office in March 1876.

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Mr. Bell being awarded the first US patent for the telephone in

1811
1876
1892
1924

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Credit for the invention of the electric telephone is disputed but Alexander Graham Bell was the first to be awarded a patent for the electric telephone by the United States Patent and Trademark Office in March                 .

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Telephone is which type of communications medium ?

Duplex
Simplex
Multiplex
Triplex

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Duplex it allow the people on both ends to talk simultaneously.

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What Mr. Bell spoke in the first successful telephone transmission of clear speech using a liquid transmitter ?

Is this clear to you Mr. David
Do you hear me Mr. David
Mr. Watson, come here, I want to see you.
Hoy Hoy Mr. John

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What is the full form of PSTN?

Public Service Telephone Network
Public Switched Telephone Network
Private Switched Telephone Network
Private ServiceTelephone Network

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What was the model number of this phone ?

Phone.jpg
Ericsson 1001
Model 9001
Ericsson 105
Model 102

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The telephone emerged after the creation and successive improvements on

Duplex Meta
Bell Sigma Suit
Electrical Telegraph
Mechanical Pone

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Who invented liquid transmitter for use with a telephone, but does not build one ?

Alexander Graham Bell
Elisha Gray
Antonio Meucci
Mechanical Pone

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The world's first long distance telephone call was about

6 miles
20 miles
60 miles
92 miles

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Alexander Graham Bell makes the world's first long distance telephone call, about 6 miles between Brantford and Paris, Ontario, Canada.

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In which year, world's first wireless telephone call was made ?

1934
1922
1901
1880

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On 1 April 1880 world's first wireless telephone call was made on Bell and Tainter's photophone.

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