Video encyclopedia

07/03/1876 Telephone is patented


The history of the telephone


The Invention Of The Telephone I THE INDUSTRIAL REVOLUTION


The First Telephone


This Is Alexander Graham Bell's Voice


The Invention of The Telephone

American inventor patented an "Improvement in Telegraphy,” which is now called the telephone. Bell himself considered his invention an intrusion on his real work as a scientist and refused to have the telephone in his study. Some scholars claim that Bell stole the telephone idea from another American inventor Elisha Gray.
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    • Essentials 

    • Early development 

    • Electro-magnetic transmitters and receivers 

    • Variable resistance transmitters 

    • Improvements to the early telephone 

    • Controversies 

    • Memorial to the invention