Telephone

By jackson02

  • Telephone invented

    1876 A.D. - Alexander Graham Bell invented the telephone.

  • Almon Strowger patents the direct dial telephone or automatic telephone exchange.

    Almon Strowger patents the direct dial telephone or automatic telephone exchange.

  • First telephone answering machines.

    First telephone answering machines.

  • Lee Deforest invents the electronic amplifying tube or triode - this allowed all electronic signals to be amplified improving all electronic communications i.e. telephones and radios.

    Lee Deforest invents the electronic amplifying tube or triode - this allowed all electronic signals to be amplified improving all electronic communications i.e. telephones and radios.

  • First wireless communication of human speech.

    1906 A.D. - First wireless communication of human speech.

  • First cross continental telephone call made.

    First cross continental telephone call made.

  • Cellular telephones in cars become widespread.

    Cellular telephones in cars become widespread.